U.S. patent application number 16/912760 was filed with the patent office on 2021-01-14 for devices, systems and methods for diagnosing and treating sinusitis and other disorders of the ears, nose and/or throat.
The applicant listed for this patent is Acclarent, Inc.. Invention is credited to John Y. Chang, Joshua Makower.
Application Number | 20210007762 16/912760 |
Document ID | / |
Family ID | 1000005109493 |
Filed Date | 2021-01-14 |
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United States Patent
Application |
20210007762 |
Kind Code |
A1 |
Chang; John Y. ; et
al. |
January 14, 2021 |
DEVICES, SYSTEMS AND METHODS FOR DIAGNOSING AND TREATING SINUSITIS
AND OTHER DISORDERS OF THE EARS, NOSE AND/OR THROAT
Abstract
Sinusitis, enlarged nasal turbinates, tumors, infections,
hearing disorders, allergic conditions, facial fractures and other
disorders of the ear, nose and throat are diagnosed and/or treated
using minimally invasive approaches and, in many cases, flexible
catheters as opposed to instruments having rigid shafts. Various
diagnostic procedures and devices are used to perform imaging
studies, mucus flow studies, air/gas flow studies, anatomic
dimension studies, endoscopic studies and transillumination
studies. Access and occluder devices may be used to establish fluid
tight seals in the anterior or posterior nasal cavities/nasopharynx
and to facilitate insertion of working devices (e.g., scopes,
guidewires, catheters, tissue cutting or remodeling devices,
electrosurgical devices, energy emitting devices, devices for
injecting diagnostic or therapeutic agents, devices for implanting
devices such as stents, substance eluting devices, substance
delivery implants, etc.
Inventors: |
Chang; John Y.; (Los Altos,
CA) ; Makower; Joshua; (Los Altos, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Acclarent, Inc. |
Irvine |
CA |
US |
|
|
Family ID: |
1000005109493 |
Appl. No.: |
16/912760 |
Filed: |
June 26, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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16424728 |
May 29, 2019 |
10695080 |
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16912760 |
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15443319 |
Feb 27, 2017 |
10492810 |
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16424728 |
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15363002 |
Nov 29, 2016 |
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15443319 |
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13867972 |
Apr 22, 2013 |
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15363002 |
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12649050 |
Dec 29, 2009 |
8425457 |
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13867972 |
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10829917 |
Apr 21, 2004 |
7654997 |
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12649050 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61M 31/00 20130101;
A61N 1/0541 20130101; A61B 2018/00327 20130101; A61M 16/0434
20130101; A61B 17/3478 20130101; A61B 2018/1405 20130101; A61F
2250/0039 20130101; A61B 2017/00477 20130101; A61B 2217/007
20130101; A61B 10/06 20130101; A61B 1/313 20130101; A61B 17/1688
20130101; A61B 2017/22061 20130101; A61M 25/10 20130101; A61B
2217/005 20130101; A61B 17/32053 20130101; A61B 2017/320064
20130101; A61B 2018/00595 20130101; A61B 17/0218 20130101; A61B
17/3201 20130101; A61B 17/29 20130101; A61F 11/004 20130101; A61M
31/005 20130101; A61B 17/320725 20130101; A61F 2/82 20130101; A61F
13/2005 20130101; A61B 17/32056 20130101; A61B 18/02 20130101; A61F
2/186 20130101; A61B 18/18 20130101; A61B 1/233 20130101; A61B
17/320783 20130101; A61B 18/12 20130101; A61B 17/320758 20130101;
A61M 29/02 20130101; A61B 17/24 20130101; A61B 2017/320052
20130101; A61F 2/18 20130101; A61B 10/0233 20130101; A61B 18/042
20130101; A61B 2018/0212 20130101 |
International
Class: |
A61B 17/24 20060101
A61B017/24; A61B 17/3207 20060101 A61B017/3207; A61F 2/82 20060101
A61F002/82; A61M 29/02 20060101 A61M029/02; A61B 17/3205 20060101
A61B017/3205; A61B 1/233 20060101 A61B001/233; A61B 10/02 20060101
A61B010/02; A61B 10/06 20060101 A61B010/06; A61B 17/02 20060101
A61B017/02; A61B 17/16 20060101 A61B017/16; A61B 17/29 20060101
A61B017/29; A61B 17/3201 20060101 A61B017/3201; A61B 18/02 20060101
A61B018/02; A61B 18/04 20060101 A61B018/04; A61B 18/12 20060101
A61B018/12; A61B 18/18 20060101 A61B018/18; A61F 2/18 20060101
A61F002/18; A61F 11/00 20060101 A61F011/00; A61F 13/20 20060101
A61F013/20; A61M 16/04 20060101 A61M016/04; A61M 25/10 20060101
A61M025/10; A61M 31/00 20060101 A61M031/00; A61N 1/05 20060101
A61N001/05 |
Claims
1. A device for removing polyps or other tissue from the nose,
nasopharynx or paranasal sinus, said device comprising: a flexible
catheter having a distal end and a lumen; a flexible tube having an
open distal end and a lumen extending therethrough, said flexible
tube being rotatably disposed within a lumen of the catheter such
that the flexible tube may rotate while the catheter does not
rotate; a rotating cutter on the distal end of the flexible tube;
and an opening formed in the catheter such that matter may be
received through the opening and cut by the rotating cutter.
2. A device according to claim 1, further comprising a connector
for connecting the lumen of the flexible tube to a source of
negative pressure such that matter that is cut by the rotating,
cutter will be suctioned though the open distal end and through the
lumen of the flexible tube.
3. A device according to claim 1 wherein the opening in the
catheter is an opening in the distal end of the catheter.
4. A device according to claim 1 wherein the opening in the
catheter is a side opening formed in a side of the catheter.
5. A device according to claim 63 wherein there is at least one
bearing disposed between the catheter and the flexible tube.
6. A device according to claim 63 further comprising a scope which
is useable to view the distal end of the catheter while the device
is inserted in the body of a patient.
7. A device according to claim 6 wherein the scope extends through
the lumen of the flexible tube.
8. A device according to claim 6 wherein the scope is attached to
the exterior of the catheter.
9. A device according to claim 6 wherein the scope is disposed in a
lumen on one side of the catheter.
10. A device according to claim 1 further comprising a side lumen
on the catheter.
11. A system comprising a device according to claim 10 in
combination with a scope positioned in the side lumen.
12. A system comprising a device according to claim 10 in
combination with a guidewire positioned in the side lumen.
13. A device according to claim 4 further comprising moveable
retractor apparatus that is operative to retract matter that has
entered the opening into contact with the rotating cutter.
14. A device according to claim 13 wherein the moveable retractor
apparatus comprises an elongate member having a retractor head,
said elongate member being advanceable in a distal direction to
move the retractor head to a location distal to the side opening
and retractable in the proximal direction to move the retractor
head in the proximal direction such that the retractor head will
propel matter that has entered the opening into contact with the
rotating cutter.
15. A device according to claim 13 wherein the catheter has a
closed distal tip.
16. A device according to claim 15 further comprising a lumen that
extends through the flexible tube and through an opening formed in
the distal tip of the catheter.
17. A system comprising a device according to claim 16 in
combination with a scope positioned within the lumen that extends
through the flexible tube and through an opening formed in the
distal tip of the catheter.
18. A system comprising a device according to claim 168 in
combination with a guidewire positioned within the lumen that
extends through the flexible tube and through an opening formed in
the distal tip of the catheter.
Description
RELATED APPLICATIONS
[0001] This patent application is a continuation of copending U.S.
patent application Ser. No. 12/649,050 filed Dec. 29, 2009 which is
a continuation of U.S. patent application Ser. No. 10/829,917 filed
Apr. 21, 2004 and issued as U.S. Pat. No. 7,654,997 on Feb. 2,
2010, the entire disclosure of each such patent and patent
application being expressly incorporated herein by reference.
FIELD OF THE INVENTION
[0002] The present invention relates generally to medical devices
and methods and more particularly to minimally invasive, catheter
based devices, systems and methods for treating sinusitis and other
ear, nose & throat disorders.
BACKGROUND
[0003] The human nose is responsible for warming, humidifying and
filtering inspired air and for conserving heat and moisture from
expired air. The nose is also an important cosmetic feature of the
face. The nose is formed mainly of cartilage, bone, mucous
membranes and skin. The right and left nostrils lead into right and
left nasal cavities on either side of the intranasal septum. The
right and left nasal cavities extend back to the soft palate, where
they merge to form the posterior choanae. The posterior choanae
opens into the nasopharynx. The roof of the nose is formed, in
part, by a bone known as the cribriform plate. The cribriform plate
contains numerous tiny perforations through which sensory nerve
fibers extend to the olfactory bulbs. The sensation of smell occurs
when inhaled odors contact a small area of mucosa in the superior
region of the nose, stimulating the nerve fibers that lead to the
olfactory bulbs.
[0004] The paranasal sinuses are cavities formed within the bones
of the face. The paranasal sinuses include frontal sinuses, ethmoid
sinuses, sphenoidal sinuses and maxillary sinuses. The paranasal
sinuses are lined with mucous-producing epithelial tissue.
Normally, mucous produced by the linings of the paranasal sinuses
slowly drains out of each sinus through an opening known as an
ostium, and into the nasopharnyx. Disorders that interfere with
drainage of mucous (e.g., occlusion of the sinus ostia) can result
in a reduced ability of the paranasal sinuses to function normally.
This results in mucosal congestion within the paranasal sinuses.
Such mucosal congestion of the sinuses can cause damage to the
epithelium that lines the sinus with subsequent decreased oxygen
tension and microbial growth (e.g., a sinus infection).
[0005] The nasal turbinates are three (or sometimes four) bony
processes that extend inwardly from the lateral walls of the nose
and are covered with mucosal tissue. These turbinates serve to
increase the interior surface area of the nose and to impart warmth
and moisture to air that is inhaled through the nose. The mucosal
tissue that covers the turbinates is capable of becoming engorged
with blood and swelling or becoming substantially devoid of blood
and shrinking, in response to changes in physiologic or
environmental conditions. The curved edge of each turbinate defines
a passageway known as a meatus. For example, the inferior meatus is
a passageway that passes beneath the inferior turbinate. Ducts,
known as the nasolacrimal ducts, drain tears from the eyes into the
nose through openings located within the inferior meatus. The
middle meatus is a passageway that extends inferior to the middle
turbinate. The middle meatus contains the semilunar hiatus, with
openings or ostia leading into the maxillary, frontal, and anterior
ethmoid sinuses. The superior meatus is located between the
superior and medial turbinates.
Nasal Polyps:
[0006] Nasal polyps are benign masses that grow from the lining of
the nose or paranasal sinuses. Nasal polyps often result from
chronic allergic rhinitis or other chronic inflammation of the
nasal mucosa. Nasal polyps are also common in children who suffer
from cystic fibrosis. In cases where nasal polyps develop to a
point where they obstruct normal drainage from the paranasal
sinuses, they can cause sinusitis.
Sinusitis:
[0007] The term "sinusitis" refers generally to any inflammation or
infection of the paranasal sinuses. Sinusitis can be caused by
bacteria, viruses, fungi (molds), allergies or combinations
thereof. It has been estimated that chronic sinusitis (e.g.,
lasting more than 3 months or so) results in 18 million to 22
million physician office visits per year in the United States.
[0008] Patients who suffer from sinusitis typically experience at
least some of the following symptoms:
[0009] headaches or facial pain
[0010] nasal congestion or postnasal drainage
[0011] difficulty breathing through one or both nostrils
[0012] bad breath
[0013] pain in the upper teeth
Proposed Mechanism of Sinus Pain & Diagnosis
[0014] The sinuses consist of a series of cavities connected by
passageways, ultimately opening into the nasal cavity. As described
previously, these passageways and cavities are formed by bone, but
covered in mucosa. If the mucosa of one of these passageways
becomes inflamed for any reason, the cavities which drain through
that passageway can become blocked. This trapping of mucous can be
periodic (resulting in episodes of pain) or chronic. Chronically
blocked passageways are targets of infection. Ultimately, it is the
dimensions of the bony passageways and thickness of the overlying
mucosa and its chronicity that dictate the duration and severity of
sinus symptoms. Thus, the primary target for sinus therapy is the
passageway, with the primary goal to regain drainage. Often CT will
not reveal these dimensional issues, especially when the patient is
not currently experiencing severe symptoms. Therefore there exists
a need to dynamically evaluate the sinus passageways under normal
conditions, in response to challenging stimuli. As suggested
herein, if it would be possible to assess sinus disease and its
dynamic component, one might better target therapy for sinusitis
and possibly be able to treat patients in a more focused and
minimally invasive manner. Such focus on the passageway and the use
of flexible instrumentation suggests an entirely new approach to
sinus intervention: one utilizing flexible catheters and guidance
tools, with passageway and cavity modifying devices capable of
being delivered with minimal damage to the surrounding tissues,
Deviated Septum:
[0015] The intranasal septum is a cartilaginous anatomical
structure that divides one side of the nose from the other.
Normally, the septum is relatively straight. A deviated septum is a
condition where the cartilage that forms the septum is abnormally
curved or bent. A deviated nasal septum may develop as the nose
grows or, in some cases, may result from trauma to the nose. A
deviated septum can interfere with proper breathing or may obstruct
normal drainage of nasal discharge, especially in patient's whose
nasal turbinates are swollen or enlarged due to allergy, overuse of
decongestant medications, etc. Such interference with drainage of
the sinuses can predispose the patient to sinus infections.
[0016] A deviated nasal septum that interferes with proper function
of the nose can be surgically corrected by a procedure known as
septoplasty. In a typical septoplasty procedure, an endoscope is
inserted into the nose and the surgeon makes an incision inside the
nose, lifts up the lining of the septum, and removes and
straightens the underlying bone and cartilage that is abnormally
deviated. Such surgical septoplasty procedures can effectively
straighten a deviated septum but, because the nasal cartilage has
some memory, the septum may tend to resume its original deviated
shape.
Reduction/Removal of Nasal Turbinates
[0017] Various surgical techniques, including endoscopic surgery,
have been used for reduction and/or removal of the inferior
turbinate in patient's whose inferior turbinate is chronically
enlarged such that it is obstructing normal breathing and/or normal
drainage from the paranasal sinuses. Typically, chronic enlargement
of the inferior turbinates is the result of allergies or chronic
inflammation. Enlargement of the inferior turbinate can be
especially problematic in patient's who also suffer from a deviated
septum that crowds or impinges upon the soft tissue of the
turbinate. Thus, a septoplasty to straighten the deviated septum is
sometimes performed concurrently with a reduction of the inferior
turbinates.
Sinus Tumors
[0018] Most polyps are benign, but one form of a nasal polyp, known
as an inverting papilloma, can develop into a malignancy. Unlike
most benign polyps, which typically occur on both sides of the
nose, an inverting papilloma is usually found on just one side.
Thus, in cases where a unilateral polyp is observed, it is usually
biopsied to determine if it is malignant. If an inverting papilloma
is detected before it becomes malignant and is removed completely,
it will typically not recur. However, using the technology that has
heretofore been available, it has sometimes been difficult to
determine if the papilloma has been entirely removed unless and
until regrowth of the polyp is observed on long term post-surgical
follow-up.
[0019] Various benign sinus tumors have also been known to occur,
but are relatively rare. The most common form of malignant sinus
tumor is squamous cell carcinoma. Even with surgery and radiation
treatment, squamous cell carcinoma of the paranasal sinus is
associated with a relatively poor prognosis. Other types of
malignant tumors that invade the paranasal sinuses include
adenocarcinoma and, more rarely, lymphoma and even more rarely,
melanoma.
Facial Fractures
[0020] The most common cause of fractures of the facial bones is
auto accidents, but facial fractures are also frequently caused by
sports injuries, industrial accidents, falls, assaults and gunshot
wounds. Some facial fractures involve bones that are accessible
from inside the nasal cavities or paranasal sinuses. Notably, the
nose is the most commonly injured facial structure due to its
prominent position on the face. Thus, fractures of the nasal bone
(with or without resultant deviated septum) are not uncommon. Other
facial fractures such as fractures of the orbital floor and/or the
ethmoid or frontal sinuses are also accessible from inside the nose
or sinuses. A common type of orbital floor fracture is a "blowout"
fracture that typically results from blunt trauma to the eye where
the force is transmitted downwardly causing the relatively thin
bone that forms the floor of the orbit to fracture downwardly. This
can cause the periorbital tissues to herniate into the maxillary
sinus and sometimes can also create a "trap door" of bone that
extends downwardly into the maxillary sinus.
Endoscopic Sinus Surgery and Other Current Procedures
[0021] Functional Endoscopic Sinus Surgery
[0022] The most common corrective surgery for chronic sinusitis is
functional endoscopic sinus surgery (FESS). In FESS, an endoscope
is inserted into the nose and, under visualization through the
endoscope, the surgeon may remove diseased or hypertrophic tissue
or bone and may enlarge the ostia of the sinuses to restore normal
drainage of the sinuses. FESS procedures can be effective in the
treatment of sinusitis and for the removal of tumors, polyps and
other aberrant growths from the nose. Other endoscopic intranasal
procedures have been used to remove pituitary tumors, to treat
Graves disease (i.e., a complication of hyperthyroidism which
results in protrusion of the eyes) and surgical repair of rare
conditions wherein cerebrospinal fluid leaks into the nose (i.e.,
cerebrospinal fluid rhinorrhea).
[0023] Surgery to reduce the size of the inferior turbinates can be
accomplished with endoscopic visualization (with magnification
where desired) and is typically performed with the patient under
general anesthesia. An incision is typically made in the mucosa
that lines the turbinate to expose the underlying bone. Some
quantity of the underlying bone may then be removed. If selective
removal of some of the mucosa or soft tissue is also desired, such
soft tissue can be debulked or removed through by traditional
surgical cutting or by the use of other tissue ablation or
debulking apparatus such as microdebriders or lasers. Less
frequently, chronically enlarged inferior turbinates have been
treated by cryotherapy. It is typically desirable to remove only as
much tissue as necessary to restore normal breathing and drainage,
as removal of too much tissue from the turbinates can impair the
ability of the turbinates to perform their physiological functions
of warming and humidifying inspired air and conserving warmth and
moisture from expired air. Complications associated with inferior
turbinate surgery include bleeding, crusting, dryness, and
scarring.
[0024] In some patients, the middle turbinate is enlarged due to
the presence of an invading air cell (concha bullosa), or the
middle turbinate may be malformed (paradoxically bent). Severe
ethmoid sinusitis or nasal polyps can also result in enlargement or
malformation of the middle turbinates. Since a substantial amount
of drainage from the sinuses passes through the middle meatus
(i.e., the passage that runs alongside middle turbinate) any
enlargement or malformation of the middle turbinate can contribute
to sinus problems and require surgical correction. Thus, in some
FESS procedures carried out to treat sinusitis, the middle meatus
is cleared (e.g., the polyps or hypertorophic tissue are removed)
thereby improving sinus drainage. However, the middle turbinate can
include some of the olfactory nerve endings that contribute to the
patient's sense of smell. For this reason, any reduction of the
middle turbinate is typically performed in a very conservative
manner with care being taken to preserve as much tissue as
possible. In patients who suffer from concha bullosa, this may
involve removing the bone on one side of an invading air sac. In
the cases where the middle turbinate is malformed, just the
offending portion(s) of the turbinate may be removed.
[0025] Extended Endoscopic Frontal Sinus Surgery
[0026] Because of its narrow anatomical configuration, inflammation
of the frontal sinuses can be particularly persistent, even after
surgery and/or medical therapy has resolved the inflammation in the
other paranasal sinuses. In cases of persistent inflammation of the
frontal sinuses, a surgery known as a trans-septal frontal
sinusotomy, or modified Lothrop procedure, is sometimes performed.
In this procedure, the surgeon removes a portion of the nasal
septum and the bony partition between the sinuses to form one large
common drainage channel for draining the frontal sinuses into the
nose. This complicated procedure, as well as some other ear, nose
and throat surgical procedures, can carry a risk of penetrating the
cranial vault and causing leakage of cerebrospinal fluid (CSF).
Also, some sinus surgeries as well as other ear, nose and throat
procedures are performed close to the optic nerves, the eyes, and
the brain and can cause damage to those structures. To minimize the
potential for such untoward complications or damage, image-guided
surgery systems have been used to perform some complex head and
neck procedures. In image guided surgery, integrated anatomical
information is supplied through CT-scan images or other anatomical
mapping data taken before the operation. Data from a preoperative
CT scan or other anatomical mapping procedure is downloaded into a
computer and special sensors known as localizers are attached to
the surgical instruments. Thus, using the computer, the surgeon can
ascertain, in three dimensions, the precise position of each
localizer-equipped surgical instrument at any given point in time.
This information, coupled with the visual observations made through
the standard endoscope, can help the surgeon to carefully position
the surgical instruments to avoid creating CSF leaks and to avoid
causing damage to nerves or other critical structures.
[0027] Shortcomings of FESS
[0028] Although FESS continues to be the gold standard therapy for
severe sinuses, it has several shortfalls. Often patients complain
of the post-operative pain and bleeding associated with the
procedure, and a significant subset of patients remain symptomatic
even after multiple surgeries. Since FESS is considered an option
only for the most severe cases (those showing abnormalities under
CT scan), a large population of patients exist that can neither
tolerate the prescribed medications nor be considered candidates
for surgery. Further, because the methodologies to assess sinus
disease are primarily static measurements (CT, MRI), patients whose
symptoms are episodic are often simply offered drug therapy when in
fact underlying mechanical factors may play a significant role. To
date, there is no mechanical therapy offered for these patients,
and even though they may fail pharmaceutical therapies, no other
course of action is indicated. This leaves a large population of
patients in need of relief, unwilling or afraid to take steroids,
but not sick enough to qualify for surgery.
[0029] One of the reasons why FESS and sinus surgery is so bloody
and painful relates to the fact that straight instrumentation with
rigid shafts are used. Due to the fact that the sinuses are so
close to the brain and other important structures, physicians have
developed techniques using straight tools and image guidance to
reduce the likelihood of penetrating into unwanted areas. In an
effort to target deep areas of the anatomy, this reliance on
straight instrumentation has resulted in the need to resect and
remove or otherwise manipulate any anatomical structures that may
lie in the path of the instruments, regardless of whether those
anatomical structures are part of the pathology. With the advances
in catheter based technology and imaging developed for the
cardiovascular system, there exists a significant opportunity to
reduce the morbidity of sinus interventional through the use of
flexible instrumentation and guidance.
[0030] If flexible tools could be developed such that sinus
intervention may be able to be carried out with even less bleeding
and post-operative pain, these procedures may be applicable to a
larger group of patients. Further, as described here, flexible
instrumentation may allow the application of new diagnostic and
therapeutic modalities that have never before been possible.
[0031] Laser or Radiofrequency Turbinate Reduction (Soft Tissue
Only)
[0032] In cases where it is not necessary to revise the bone that
underlies the turbinate, the surgeon may elect to perform a laser
or radiofrequency procedure designed to create a coagulative lesion
in (or on) the turbinate, which in turn causes the soft tissue of
the turbinate to shrink. Also, in some cases, a plasma generator
wand may be used create high energy plasma adjacent to the
turbinate to cause a reduction in the size of the turbinate.
[0033] One example of a radio frequency procedure that may be used
to shrink enlarged inferior turbinates is radiofrequency volumetric
tissue reduction (RFVTR) using the Somnoplasty.RTM. system (Somnus
Medical Technologies, Sunnyvale, Calif.). The Somnoplasty.RTM.
system includes a radio frequency generator attached to a probe.
The probe is inserted through the mucosa into the underlying soft
tissue of the turbinate, usually under direct visualization.
Radiofrequency energy is then delivered to heat the submucosal
tissue around the probe, thereby creating a submucosal coagulative
lesion while allowing the mucosa to remain in tact. As the
coagulative lesion heals, the submucosal tissue shrinks thereby
reducing the overall size of the turbinate. Radiofrequency
volumetric tissue reduction (RFVTR) can be performed as an office
procedure with local anesthesia.
[0034] Many of the above-described procedures and techniques may be
adaptable to minimally invasive approaches and/or the use of
flexible instrumentation. There exists a need in the art for the
development of such minimally invasive procedures and techniques as
well as instrumentation (e.g., flexible instruments or catheters)
useable to perform such procedures and techniques.
SUMMARY OF THE INVENTION
[0035] In general, the present invention provides methods, devices
and systems for diagnosing and/or treating sinusitis or other
conditions of the ear, nose or throat.
[0036] In accordance with the present invention, there are provided
methods wherein one or more flexible catheters or other flexible
elongate devices as described herein are inserted in to the nose,
nasopharynx, paranasal sinus, middle ear or associated anatomical
passageways to perform an interventional or surgical procedure.
Examples of procedures that may be performed using these flexible
catheters or other flexible elongate devices include but are not
limited to: delivering contrast medium; delivering a
therapeutically effective amount of a therapeutic substance;
implanting a stent, tissue remodeling device, substance delivery
implant or other therapeutic apparatus; cutting, ablating,
debulking, cauterizing, heating, freezing, lasing, dilating or
otherwise modifying tissue such as nasal polyps, abberant or
enlarged tissue, abnormal tissue, etc.; grafting or implanting
cells or tissue; reducing, setting, screwing, applying adhesive to,
affixing, decompressing or otherwise treating a fracture;
delivering a gene or gene therapy preparation; cutting, ablating,
debulking, cauterizing, heating, freezing, lasing, forming an
osteotomy or trephination in or otherwise modifying bony or
cartilaginous tissue within paranasal sinus or elsewhere within the
nose; remodeling or changing the shape, size or configuration of a
sinus ostium or other anatomical structure that affects drainage
from one or more paranasal sinuses; removing puss or aberrant
matter from the paranasal sinus or elsewhere within the nose;
scraping or otherwise removing cells that line the interior of a
paranasal sinus; removing all or a portion of a tumor; removing a
polyp; delivering histamine, an allergen or another substance that
causes secretion of mucous by tissues within a paranasal sinus to
permit assessment of drainage from the sinus; implanting a cochlear
implant or indwelling hearing aid or amplification device, etc.
[0037] Further in accordance with the invention, there are provided
methods for diagnosing and assessing sinus conditions, including
methods for delivering contrast media into cavities, assessing
mucosal flow, assessing passageway resistance and cilliary
function, exposing certain regions to antigen challenge, etc
[0038] Still further in accordance with the invention, there are
provided novel devices for performing some or all of the procedures
described herein.
[0039] Further aspects, details and embodiments of the present
invention will be understood by those of skill in the art upon
reading the following detailed description of the invention and the
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0040] FIG. 1A (Prior Art) is a frontal view of a human head
showing the locations of the paranasal sinuses.
[0041] FIG. 1B (Prior Art) is a side view of a human head showing
the locations of the paranasal sinuses.
[0042] FIG. 2A is a partial sectional view of head of a human
patient showing the right nasal cavity, the right side of the
nasopharynx and the associated paranasal sinuses, with an
anterior/posterior occluder & access device of the present
invention inserted therein.
[0043] FIG. 2B is a partial sectional view of head of a human
patient showing the left nasal cavity, the left side of the
nasopharynx and the associated paranasal sinuses, with an anterior
occluder & access device of the present invention inserted
therein.
[0044] FIG. 2C is a cross sectional view through line C-C of FIG.
2A.
[0045] FIG. 2D is a cross sectional view through line D-D of FIG.
2B.
[0046] FIG. 2E is a perspective view of a posterior
occluder/suction/access device of the present invention that is
insertable through the oral cavity.
[0047] FIG. 2F is a cross-sectional view through Line 2F-2F of FIG.
2E.
[0048] FIG. 2G is a partial sectional view of head of a human
patient showing the right nasal cavity, the right side of the
nasopharynx and the associated paranasal sinuses, with an anterior
occluder & access device of the present invention inserted in
the right nasal cavity and a posterior occluder/suction/access
device of FIG. 2E inserted through the oral cavity.
[0049] FIG. 2H is a partial sectional view of head of a human
patient showing the left nasal cavity, the left side of the
nasopharynx and the associated paranasal sinuses, with an anterior
occluder & access device of the present invention inserted in
the left nasal cavity and the same posterior
occluder/suction/access device that appears in FIG. 2G extending
through the oral cavity.
[0050] FIG. 2I is a perspective view of a posterior
occluder/suction device of the present invention that is insertable
transnasally.
[0051] FIG. 2J is a cross-sectional view through Line 2J-2J of FIG.
2I.
[0052] FIG. 2K is a partial sectional view of head of a human
patient showing the right nasal cavity, the right side of the
nasopharynx and the associated paranasal sinuses, with the
posterior occluder/suction device shown in FIG. 2I inserted through
the right nasal cavity.
[0053] FIG. 2L is a partial sectional view of head of a human
patient showing the left nasal cavity, the left side of the
nasopharynx and the associated paranasal sinuses and showing the
posterior occluder portion of the device of FIG. 2K residing in and
occluding the nasopharynx at a location posterior to the septum and
superior to the glottis.
[0054] FIG. 2M is a partial sectional view of head of a human
patient showing the right nasal cavity, the right side of the
nasopharynx and the associated paranasal sinuses, with an extended
posterior occluder/suction device inserted through the right nasal
cavity.
[0055] FIG. 2N is a partial sectional view of head of a human
patient showing the left nasal cavity, the left side of the
nasopharynx and the associated paranasal sinuses and showing the
posterior occluder and distal tubular extension portions of the
device of FIG. 2M residing in the nasopharynx posterior to the
septum and superior to the glottis.
[0056] FIG. 2O is a partial sectional view of head of a human
patient showing the right nasal cavity, the right side of the
nasopharynx and the associated paranasal sinuses, with a posterior
occluder/slidable suction device inserted through the right nasal
cavity.
[0057] FIG. 2P is a partial sectional view of head of a human
patient showing the left nasal cavity, the left side of the
nasopharynx and the associated paranasal sinuses and showing the
posterior occluder and distal portion of the slidable suction
cannula of the device of FIG. 2O residing in the nasopharynx
posterior to the septum and superior to the glottis.
[0058] FIG. 2Q is a partial sectional view of head of a human
patient showing the right nasal cavity, the right side of the
nasopharynx and the associated paranasal sinuses, with another
posterior occluder/tapered suction device inserted through the
right nasal cavity.
[0059] FIG. 2R is a partial sectional view of head of a human
patient showing the left nasal cavity, the left side of the
nasopharynx and the associated paranasal sinuses and showing the
posterior occluder and distal portion of the tapered suction
cannula of the device of FIG. 2Q residing in the nasopharynx
posterior to the septum and superior to the glottis.
[0060] FIG. 3A is a partial perspective view of one embodiment of
an occluder/suction device of the present invention positioned
within an anatomical passageway.
[0061] FIG. 3B is a partial perspective view of another embodiment
of an occluder/suction device of the present invention positioned
within an anatomical passageway.
[0062] FIG. 3C is a partial perspective view of another embodiment
of an occluder/suction device of the present invention positioned
within an anatomical passageway.
[0063] FIG. 3C' is a cross sectional view through line 3C'-3C' of
FIG. 3C.
[0064] FIG. 3D is a partial perspective view of yet another
embodiment of an occluder/suction device of the present invention
positioned within an anatomical passageway.
[0065] FIGS. 3E', 3E' and 3E''' are partial perspective views of
still another embodiment of an occluder/suction device of the
present invention showing various steps in a process by which the
occluder/suction device is positioned within an anatomical
passageway.
[0066] FIG. 3F is a partial perspective view of still another
embodiment of an occluder/suction device of the present invention
positioned within an anatomical passageway.
[0067] FIGS. 3F', 3F'' and 3F''' show alternative constructions of
the distal portion of the suction cannula of the occluder/suction
device shown in FIG. 3F.
[0068] FIG. 3G is a partial perspective view of still another
embodiment of an occluder/suction device of the present invention
positioned within an anatomical passageway.
[0069] FIG. 3H is a partial perspective view of still another
embodiment of an occluder/suction device of the present invention
positioned within an anatomical passageway.
[0070] FIG. 3I is a partial perspective view of still another
embodiment of an occluder/suction device of the present invention
positioned within an anatomical passageway.
[0071] FIG. 3J is a partial perspective view of still another
embodiment of an occluder/suction device of the present invention
positioned within an anatomical passageway.
[0072] FIG. 3K is a partial perspective view of still another
embodiment of an occluder/suction device of the present invention
positioned within an anatomical passageway.
[0073] FIGS. 3L' and 3L'' show partial longitudinal sectional views
of another occluder/suction device of the present invention.
[0074] FIGS. 3M' and 3M'' show partial perspective views of another
occluder/suction device of the present invention positioned within
an anatomical passageway.
[0075] FIG. 4 is a longitudinal sectional view of the oropharynx
and anterior neck of a human patient having a nasopharyngeal
occluder/endotracheal tube device of the present invention inserted
through the right nasal cavity and into the trachea.
[0076] FIG. 5A is a partial perspective view of a side cutting or
ablation device being used in accordance with the present
invention.
[0077] FIG. 5B is a partial perspective view of a device having
laterally deployable needles, electrodes or other treatment
delivering projections, being used in accordance with the present
invention.
[0078] FIG. 5C is a partial perspective view of a drill (e.g., a
tissue drill, bone drill, or trephine device) being used in
accordance with the present invention.
[0079] FIG. 5D is a partial perspective view of a catheter having a
laterally deployed needle or tube for delivering a substance or
apparatus to a target location and an optional on-board imaging or
guidance apparatus, being used in accordance with the present
invention.
[0080] FIG. 5E is a partial perspective view of a balloon catheter
being used in accordance with the present invention.
[0081] FIG. 5F is a partial perspective view of a balloon catheter
having blades or electrodes thereon, being used in accordance with
the present invention.
[0082] FIG. 5G' is a partial perspective view of a balloon catheter
having a stent positioned thereon being inserted into an occluded
region within the nose, nasopharynx or paranasal sinus in
accordance with the present invention.
[0083] FIG. 5G'' shows the balloon catheter and stent of FIG. 3G',
with the balloon inflated and the stent expanded so as to open or
dilate the occluded region within the nose, nasopharynx or
paranasal sinus.
[0084] FIG. 5G''' shows the balloon catheter and stent of FIG. 3G'
with the stent implanted, the balloon deflated and the catheter
being withdrawn and removed,
[0085] FIG. 5H is a partial perspective view of a tissue shrinking
electrode device being used in accordance with the present
invention.
[0086] FIG. 5I is a partial perspective view of a cryogenic or
plasma state treatment device being used in accordance with the
present invention.
[0087] FIG. 5J is a partial perspective view of an expandable
tissue expanding device positioned within a passageway in the nose,
nasopharynx or paranasal sinus in accordance with the present
invention.
[0088] FIG. 5K is a partial sectional view of one embodiment of a
forward cutting/suction catheter of the present invention.
[0089] FIGS. 5K' shows the device of FIG. 5K being used to remove a
nasal polyp or other obstructive mass from an anatomical passage
within the nose or paranasal sinus.
[0090] FIG. 5L is a partial sectional view of a forward
cutting/suction catheter/endoscope device of the present
invention.
[0091] FIG. 5M is a partial sectional view of a side
cutting/suction catheter device of the present invention.
[0092] FIG. 5N is a partial sectional view of a side
cutting/suction catheter device of the present invention having an
optional guidewire lumen and optional endoscopic component(s).
[0093] FIG. 5O is a partial perspective view of the distal end of a
guide catheter/endoscope of the present invention.
[0094] FIG. 5P is a partial perspective view of a balloon
catheter/pressure-expandable intranasal stent/endoscope device of
the present invention.
[0095] FIG. 5Q is a partial perspective view of a delivery
catheter/self expanding intranasal stent/endoscope device of the
present invention.
[0096] FIG. 5Q' is a cross-sectional view through line 5Q'-5Q' of
FIG. 5Q.
[0097] FIG. 5R' shows an example of an optional modified shape of
the balloon and stent of FIG. 5P.
[0098] FIG. 5R'' shows another example of an optional modified
shape of the balloon and stent of FIG. 5P.
[0099] FIG. 5S is a partial perspective view of a snare catheter of
the present invention with optional endoscopic component(s).
[0100] FIG. 5T is a partial perspective view of a forceps device of
the present invention having optional endoscopic component(s).
[0101] FIG. 5U is a partial perspective view of a system of the
present invention comprising a guide catheter, endoscope and
guidewire.
[0102] FIG. 5U' is a cross-sectional view through line 5T'-5T' of
FIG. 5T.
[0103] FIG. 5V is a partial perspective view of a microdebrider
catheter of the present invention.
[0104] FIG. 5W is a partial perspective view of a bone remodeling
device of the present invention.
[0105] FIGS. 5W' and 5W'' show steps in a method for using the bone
remodeling device of FIG. 5W.
[0106] FIGS. 5X'-5X'''' are partial perspective views of
alternative designs for bone remodeling devices of the present
invention.
[0107] FIGS. 5Y-5Y''''' are perspective views of examples of
substance delivering implant devices useable in the present
invention.
[0108] FIG. 6A is a perspective view of one embodiment of a
sphenoid sinus guide catheter of the present invention.
[0109] FIG. 6B is a perspective view of a frontal sinus guide
catheter of the present invention.
[0110] FIG. 6C is a perspective view of one embodiment of a
maxillary sinus guide catheter of the present invention.
[0111] FIG. 6D is a perspective view of one embodiment of an
ethmoid sinus guide catheter of the present invention.
[0112] FIG. 6E is a perspective view of one embodiment of a
plugging guide catheter of the present invention useable for
temporarily plugging the opening into a nasolacrimal duct or
Eustachian tube,
[0113] FIG. 7A is a sectional view of a paranasal sinus with a
catheter introducing an expandable electrode cage into the sinus in
accordance with the present invention.
[0114] FIG. 7B is a sectional view of a paranasal sinus that is
filled with a diagnostic or therapeutic substance and wherein a
plug tipped catheter is being used to plug the ostium of the sinus
to retain the substance within the sinus, in accordance with the
present invention.
[0115] FIG. 7C is a sectional view of a paranasal sinus with a
catheter introducing a diagnostic or therapeutic substance into
contact with the tissue lining the sinus, in accordance with the
present invention.
[0116] FIG. 7D is a sectional view of a paranasal sinus with a
catheter having emitters and/or sensors for 3 dimensional mapping
or navigation, in accordance with the present invention.
[0117] FIG. 7E is a sectional view of a paranasal sinus with a
catheter delivering a coil apparatus into the sinus to embolize the
sinus and/or to deliver a diagnostic or therapeutic substance into
the sinus in accordance with the present invention.
[0118] FIG. 7F is a sectional view of a paranasal sinus with a
guide catheter, guide wire and over-the-wire flexible endoscope
inserted into the sinus, in accordance with the present
invention.
[0119] FIG. 7G shows the guide catheter and endoscope of FIG. 5F
with a working device (e.g., a biopsy instrument) inserted through
a working channel of the endoscope to perform a procedure within
the sinus under endoscopic visualization, in accordance with the
present invention.
[0120] FIGS. 8A-8E show steps in a sinus treatment procedure
conducted in accordance with the present invention.
[0121] FIGS. 9A-9C show steps in a cochlear implant procedure
conducted in accordance with the present invention.
DETAILED DESCRIPTION
[0122] The following detailed description and the accompanying
drawings are intended to describe some, but not necessarily all,
examples or embodiments of the invention only and does not limit
the scope of the invention in any way.
[0123] A number of the drawings in this patent application show
anatomical structures of the ear, nose and throat. In general,
these anatomical structures are labeled with the following
reference letters: [0124] Nasal Cavity NC [0125] Nasopharynx NP
[0126] Superior Turbinate ST [0127] Middle Turbinate MT [0128]
Inferior Turbinate IT [0129] Frontal Sinus FS [0130] Ethmoid Sinus
ES [0131] Sphenoid Sinus SS [0132] Sphenoid Sinus Ostium SSO [0133]
Maxillary Sinus MS
[0134] The human nose has right and left nostrils or nares which
lead into separate right and left nasal cavities. The right and
left nasal cavities are separated by the intranasal septum, which
is formed substantially of cartilage and bone. Posterior to the
intranasal septum, the nasal cavities converge into a single
nasopharyngeal cavity. The right and left Eustachian tubes (i.e.,
auditory tubes) extend from the middle ear on each side of the head
to openings located on the lateral aspects of the nasopharynx. The
nasopharynx extends inferiorly over the uvula and into the pharynx.
As shown in FIGS. 1A and 1B, paranasal sinuses are formed in the
facial bones on either side of the face. The paranasal sinuses
open, through individual openings or ostia, into the nasal
cavities. The paranasal sinuses include frontal sinuses FS, ethmoid
sinuses ES, sphenoidal sinuses SS and maxillary sinuses MS.
[0135] The present invention provides a comprehensive system of
devices and associated methods for diagnosing and treating
disorders of the ears, nose and throat in a less invasive fashion
than current day approaches. Specifically, examples of which are
described below, the invention provides devices that wholly or
partially effect a fluid-tight seal of the operative field (e.g.,
the nasopharynx and/or one or more of the sinus cavities or
regional ducts). This fluid-tight sealing of the operative field
allows the cavities, ducts and passageways to be imaged using
fluid/gas based agents in combination with various imaging
modalities without the risk of aspiration or uncontrolled leakage
of fluid from the operative field. Further, this fluid-tight
sealing of the operative field permits the retention and collection
of any blood or flushing fluids released during the procedure.
Another aspect of the invention is a set of methods and devices
useable to assess the static and dynamic nature of the paranasal
sinuses and to provide for the guidance of specific therapies to
particular sinuses or particular target regions (e.g., stenotic
sinus ostia, infected tissues within sinuses, tumors, other target
structures). Another aspect of the invention is the use of devices
and methods which are designed for minimally invasive entry into
the sinus passageways or regional ducts under image and/or
endoscopic guidance to provide local therapy such as dilation,
ablation, resection, injection, implantation, etc. to the region of
concern. These devices and methods may be disposable or temporary
in their application, or they may be implantable with on-going
functionality (such as implantable drug delivery systems, cochlear
implants, etc.). In a number of embodiments, the present invention
utilizes flexible catheters and various working devices that are
mounted on or delivered through elongate flexible members or
catheters, to diagnose and treat a wide range or ear, nose and
throat disorders including; nasal polyps, sinusitis, enlarged
turbinates, deviated septum, tumors, infections, deformities, etc.
The following pages describe a number of specific devices and
methods that are useable in accordance with this invention. It is
to be understood that any component, element, limitation, attribute
or step described in relation to any particular device or method
described herebelow, may be incorporated in or used with any other
device or method of the present invention unless to do so would
render the resultant device or method unusable for its intended
purpose.
[0136] Occluders & Access Port Devices
[0137] Many of the procedures of the present invention require the
insertion and positioning of one or more flexible catheters or
other flexible elongate working devices (examples of which are
shown in FIGS. 5A-5Y''''' and described herebelow) within the nose,
nasopharynx, middle ear or paranasal sinuses. To facilitate the
insertion and proper positioning of such catheters and/or other
elongate working devices and to prevent undesirable drainage of
blood or debris from the operative site, the present invention
includes a number of different occluder and/or access port devices,
examples of which are shown in FIGS. 2A-2R, that are inserted
through the nose and/or oral cavity and function to a) prevent
unwanted drainage or escape of fluid (e.g., gas or liquid) and b)
facilitate the insertion and positioning of guides and working
devices, examples of such working devices being shown in FIGS.
5A-5Y''''' and 6A-6E.
[0138] FIGS. 2A-2B show partial sectional views of opposite sides
of the head of a human patient having an anterior/posterior
occluder & access device 10 inserted through the right nasal
cavity and anterior occluder & access device 12 positioned in
the anterior region of the left nasal cavity. Specifically, FIG. 2A
shows the nasal cavity, the right side of the nasopharynx and the
associated paranasal sinuses, with an anterior/posterior occluder
& access device 10 of the present invention inserted therein.
The anterior/posterior occluder & access device 10 comprises an
anterior occluder 14 which occludes the right nasal cavity on the
right side of the nasal septum, a posterior occluder 18 that
occludes the posterior choanae, nasopharynx or pharynx posterior to
the nasal septum (but typically superior to the glottis) and a tube
16 that extends between the anterior occluder 14 and posterior
occluder 18. Devices for posterior occlusion and anterior occlusion
may be used alone or in combination. They may be coaxially deployed
or alternatively they may be deployed in a singular fashion, one in
each orifice. It should be noted that any combination of these
sealing modalities may be employed to achieve one or more of the
stated objectives. A cross-section through the tube 16 is shown in
FIG. 2C. Other cross-sectional configurations could also be
possible, including those that comprise more lumens to permit the
passage of multiple devices or fluids (e.g., liquid or gases). In
some embodiments, it may be desirable for the device 10 (or any of
the other occluder/access devices described herein) to have
separate lumens for infusion and aspiration, thereby allowing for
concurrent infusion of an irrigation fluid or other fluid and
suctioning of the irrigation fluid or other fluid from the
operative field. Such continuous turnover of fluid within a sealed
operative field may be useful for clearing blood or debris from the
operative field to facilitate unobstructed viewing of the
anatomical structures using an endoscope or for various other
reasons. A port body 28 as attached to the proximal end of the tube
16. A device insertion aperture 30 extends through the port body 28
into working lumen 50 of tube 16. One or more outlet openings 22,
24 are at location(s) in the tube such that a device (e.g., a
catheter, fluid injector or other elongate device examples of which
are shown in FIGS. 5A-5Y''''' and described herebelow) or fluid(s)
may be inserted into the device insertion opening 30, advanced
through the working lumen 50 and out of a selected one of the
outlet openings 22, 24 to a position within the nose, nasopharynx
or paranasal sinus. In the particular embodiment shown in FIG. 2A
the anterior and posterior occluders 14, 18 comprise balloons, but
various other types of occluders could be used in place of
balloons, examples of which are shown in FIGS. 3A-3K and described
herebelow. Balloon inflation/deflation lumens 52, 56 extends from
proximal Luer connectors 32, 36, through the tube 16 and to the
anterior occluder 14 and posterior occluder 18, respectively. Thus,
a syringe or other fluid expelling and/or withdrawing device may be
connected to connector 32 and used to selectively inflate and/or
deflate the anterior occluder 14. Another syringe or other fluid
expelling and/or withdrawing device may be connected to connector
36 and used to selectively inflate and/or deflate the posterior
occluder 18. As may be appreciated from the showing of FIG. 2B, the
posterior occluder (when fully inflated) may be sized and shaped to
occlude the entire posterior choanae, nasopharynx or pharynx
posterior to the nasal septum (but typically superior to the
glottis), thereby preventing blood or other fluid or debris from
draining into the patient's pharynx from either the right or left
nasal cavity. When fully inflated, the anterior occluder 14 of the
device 10 occludes only the right nasal cavity and serves to
prevent blood, other fluid or debris from draining around the tube
16 and out of the right nostril during the operative procedure. A
one way valve, such as a flapper valve, duckbill valve, hemostatic
valve or other one way valve of the type well known in the art of
biomedical device design, may be positioned within the port body 28
to permit a catheter or other elongate device (examples of which
are shown in FIGS. 6A-5T and described herebelow) to be advanced in
the distal direction though insertion port 30, through the port
body 28 and through the working lumen 50 but to prevent blood,
other fluid or debris from draining through the working lumen 50
out of the device insertion port 30. In this manner, the device 10
forms a substantially fluid tight anterior seal in the anterior
aspect of the right nasal cavity and a substantially fluid tight
posterior seal in the posterior choanae, nasopharynx or pharynx
posterior to the nasal septum (but typically superior to the
glottis). Since a substantially fluid tight seal is formed, one or
more valves (not shown) may be provided to relieve positive or
negative pressure created between the anterior or posterior
occluders 14, 18 as a result of the injection of matter (e.g.,
contrast medium, irrigation solution, medicament, etc.) into the
operative field and/or suctioning or removal of matter (e.g.,
blood, other fluid or debris) from the operative field.
Additionally, a suction lumen 54 may extend from suction Luer
connector 34, through suction lumen 54 and to suction openings 26
may be formed in the tube 16. A suction pump may be connected to
the suction connector 34 to aspirate blood, other fluid and/or
debris out of the right nasal operative region defined between
anterior occluder 14 and posterior occluder 18. It should be
appreciated that, while the occlusion/access devices shown in the
drawings and described herein are designed to isolate a relatively
large operative field (e.g., one or both nasal cavities, sinus,
nasal cavities-nasopharynx, etc.), once a specific problem has been
diagnosed and/or once a specific target region has been identified,
the occluders 14, 18 may be repositioned and/or other occluder
devices may be inserted to isolate and form a fluid tight seal of
just a portion of the original operative field (e.g., just one
sinus, one nasal cavity, one Eustachian tube, etc.) thereby
allowing the procedure to go forward with only the necessary
region(s) of the nose, nasopharynx, paranasal sinuses or other
structures sealed off and/or instrumented, to minimize trauma and
improve patient comfort.
[0139] It should be appreciated that in any embodiment of an
anterior/posterior occluder & access device, such as the device
10 shown in FIGS. 2A and 2B, the distance between the anterior
occluder 14 and posterior occluder 18 may be adjustable so as to
accommodate variations in anatomy and/or specific target regions or
isolated operative fields of interest. The anterior and posterior
occluders 14, 18 may be separate devices where the anterior
occluder may slide or pass through one lumen of the posterior
occluder, which may contain several lumens (e.g., inflation,
working channel, irrigation, etc.), and may or may not be
integrated with the posterior occluder. The posterior occluder may
also contain several lumens (e.g., inflation, working channel,
irrigation, etc.). Additionally, all lumens for both the anterior
and posterior occluders may contain valves so as to prevent leakage
or flow of gas, fluid, blood, etc.
[0140] It is to be further appreciated that in embodiments that
have anterior and posterior outlet openings 22, 24 (as shown in the
example of FIGS. 2A-2B) tools, instrumentation and fluids may be
delivered via either of the posterior or anterior access ports 22,
24. In some cases, access via a posterior outlet 24 is desirable to
gain a better perspective on the target anatomical lumen or lumen
(i.e. openings to the ethmoid cells).
[0141] As shown in FIGS. 28 and 2D, in some procedures wherein the
anterior/posterior occluder & access device 10 is inserted
through one nasal cavity, it may be desirable to position a
separate anterior occluder & access device 12 within the
opposite nasal cavity to prevent drainage of blood, other fluid or
debris from the other nostril and to facilitate insertion of
catheters or other elongate devices (examples of which are shown in
FIGS. 5A-5T and described herebelow) into the left nasal cavity and
the paranasal sinuses or other anatomical structures accessible
from the other nasal cavity. As shown, in FIG. 2B, the anterior
occluder & access device 12 may comprise a tube 41 having an
anterior occluder 40 and a port body 42 attached thereto. A device
insertion aperture 44 extends through the port body 42 and through
a working lumen 58 of tube 41 to an outlet aperture in the distal
end of tube 41. A one way valve (such as the valve described
hereabove in connection with the anterior/posterior occluder &
access device 10) may optionally be provided within port body 42 to
prevent draining of blood, other fluid or debris out of insertion
aperture 44. In the particular embodiment shown in FIGS. 2B and 2D,
the anterior occluder 40 is a balloon, but such occluder 40 may be
of various other constructions, examples of which are shown in
FIGS. 3A-3M'' and described herebelow. To facilitate inflation and
deflation of this balloon type anterior occluder 40, a balloon
inflation/deflation lumen 60 extends from Luer connector 48,
through tube 41 to the balloon-type anterior occluder 40. A syringe
or other fluid expelling and/or withdrawing device may be connected
to connector 48 and used to selectively inflate and/or deflate the
anterior occluder 40. Optionally, a side tube and Luer connector 46
may be connected to the working lumen 58 of tube 41 to allow blood,
other fluid and debris to be suctioned from the left nasal cavity
through the working lumen 58 of tube 41. In some embodiments,
dedicated suction and/or irrigation lumen(s) with separate suction
and/or irrigation ports may be formed in tube 41 in a manner
similar to that described hereabove with respect to the
anterior/posterior occluder & access device 10.
[0142] FIGS. 2E-2H show an alternative system for occlusion and
access, wherein anterior occluder & access device(s) 12 is/are
positioned in one or both nostrils or nasal cavities and an orally
insertable posterior occluder device 300 is inserted through the
patient's oral cavity and positioned so as to occlude the posterior
choanae, nasopharynx or pharynx posterior to the nasal septum (but
typically superior to the glottis). The embodiment of the orally
insertable posterior occluder device 300 shown in FIGS. 2E-2G
comprises a curved tube 302 having an occluder 304 positioned at or
near the distal end thereof. The device 300 is configured such that
it may be inserted through the patient's oral cavity to a position
where the occluder 304 is located within, and disposed, so as to
substantially occlude the posterior choanae, nasopharynx or pharynx
posterior to the nasal septum (but typically superior to the
glottis). The posterior occluder 304 may also be positioned next to
the Eustachian tube to block the Eustachian tube, thereby
preventing fluid from tracking into the Eustachian tube during the
procedure (if access to the Eustachian tube or middle ear or inner
ear is not desired). Further, it may be necessary to place specific
targeted balloons or occluders in ducts or channels which are not
intended to be intervened upon (lacrimal ducts, Eustachian tubes,
etc.). In such cases, these extra ductal occluders serve to prevent
aberrant fluid/gas loss and/or to maintain the integrity of the
lumen, while other nearby structures are being modified. In the
particular example shown in FIGS. 2E-2G, the occluder 304 comprises
a balloon. However, such occluder 304 may be constructed in various
alternative ways, examples of which are shown in FIGS. 3A-3K and
described herebelow. As may be appreciated from the cross-sectional
showing of FIG. 2F, in this example a balloon inflation/deflation
lumen 318 may extend from Luer connector 314, through tube 302 to
the balloon-type occluder 304. A syringe or other
inflation/deflation apparatus may be attached to the Luer connector
314 and used to inflate and deflate the balloon 304. A stopcock or
other valve (not shown) may also be provided on balloon inflation
tube 318 to maintain inflation of the balloon when desired. In
routine use, the occluder 304 is initially deflated and the device
300 is inserted through the oral cavity and advanced to its desired
position with the deflated occluder positioned within the posterior
choanae, nasopharynx or pharynx posterior to the nasal septum (but
typically superior to the glottis). Thereafter, the occluder 304
may be expanded (e.g., inflated) such that it occludes or blocks
the posterior choanae, nasopharynx or pharynx posterior to the
nasal septum (but typically superior to the glottis), thereby
substantially preventing blood, other fluid or debris from draining
into the patient's esophagus or trachea during the procedure. In
some cases, as shown in FIGS. 2E-2H, the tube 302 may have one or
more lumen(s) 310 that extend(s) through the occluder 304 and
open(s) through an opening 310 distal to the balloon. Working
devices, such as catheters or other elongate devices examples of
which are shown in FIGS. 5A-5Y''''' and described herebelow may be
advanced through such a lumen 310 and into the patient's
nasopharynx, nasal cavities, paranasal sinuses, middle ears, etc.
Alternatively, suction may be applied to such a lumen 310 to
suction blood, other fluid or debris from the area superior to the
occluder 304. In some cases, the lumen 310 shown may be divided
into a working lumen and a suction lumen. The suction lumen may
terminate in separate suction port(s) (not shown) at the distal end
of the tube and a connector (not shown) at the proximal end, such
that suction may be applied through a lumen that is separate from
the lumen through which the working device(s) is/are passed. A port
body 306 may be positioned on the proximal end of the tube 302. A
device insertion port 308 may extend through the port body 306 into
a lumen 310 of the tube 302. A one way valve, such as a flapper
valve, duckbill valve, hemostatic valve or other one way valve of
the type well known in the art of biomedical device design, may be
positioned within the port body 306 to permit a catheter or other
elongate device to be advanced in the distal direction though
insertion port 308, through the port body 306 and through a lumen
310 but to prevent blood, other fluid or debris from draining
through the lumen 310 and out of the device insertion port 308. In
some cases, the orally insertable posterior occluder device 300 may
be used without any anterior occluder device(s) positioned in the
nostril(s) or nasal cavity(ies). In other cases, it will be
desirable to use this orally insertable posterior occluder device
300 in combination with one or two anterior occluder & access
devices 12 as shown in the example of FIGS. 2G and 2H. The use of
these devices 300, 12 in combination serves to establish a
substantially fluid tight operative field between the posterior
occluder 304 and the anterior occluder(s) 40 while allowing various
catheters and other operative instruments to be inserted into the
operative field through optional access ports 44 and/or 308.
[0143] FIGS. 2I-2L show a trans-nasally insertable posterior
occluder device 301 that does not include any anterior occluder.
This device 301 comprises a curved tube 303 having an occluder 305
positioned at or near the distal end of the tube 303. As shown in
FIGS. 2K-2L, this device 301 is inserted through either the right
or left nasal cavity and advanced to a position where the occluder
305 substantially occludes the posterior choanae, nasopharynx or
pharynx posterior to the nasal septum (but typically superior to
the glottis). In the particular example shown, this occluder 305
comprises a balloon. However, such occluder 305 may be constructed
in various alternative ways, examples of which are shown in FIGS.
3A-3K and described herebelow. As may be appreciated from the
cross-sectional showing of FIG. 2J, in this example a balloon
inflation/deflation lumen 317 may extend from Luer connector 311,
through tube 303 to the balloon-type occluder 305. A syringe or
other inflation/deflation apparatus may be attached to the Luer
connector 311 and used to inflate and deflate the balloon-type
occluder 305. A stopcock or other valve (not shown) may also be
provided on balloon inflation lumen 317 to maintain inflation of
the balloon when desired. In routine use, the occluder 305 is
initially deflated and the device 301 is inserted through the right
or left nasal cavity and advanced to its desired position where the
deflated occluder 305 is positioned within the posterior choanae,
nasopharynx or pharynx posterior to the nasal septum (but typically
superior to the glottis). Thereafter, the occluder 305 may be
expanded (e.g., inflated) such that it occludes or blocks the
posterior choanae, nasopharynx or pharynx posterior to the nasal
septum (but typically superior to the glottis), thereby
substantially preventing blood, other fluid or debris from draining
into the patient's esophagus or trachea during the procedure.
Optionally, distal suction ports 309 and/or proximal suction ports
307 may open into lumen 315 of the tube 303 and such lumen 315 may
be attached to a suction connector 313. In this manner, suction may
be applied to remove blood, other fluid or debris from the
nasopharynx superior to the occluder 305 and/or from the nasal
cavity through which the device 3301 is inserted. As may be
appreciated from the showings of FIGS. 2K and 2L, in this example,
the trans-nasal posterior occluder device 301 is inserted through
the right nasal cavity. A working device WD such as a catheter or
other elongate operative apparatus (examples of which are shown in
FIGS. 5A-5Y''''' and described herebelow) may be advanced into the
right nasal cavity adjacent to the tube 303 or through the left
nasal cavity which remains open, as no anterior occlusion is
provided by this trans-nasal posterior occluder device 301. This
arrangement may be particularly suitable for procedures where the
physician desires to directly visualize, through the nostril(s),
the anatomical structures within the nose, such as the inferior,
middle or superior turbinates IT, MT, ST, as shown in FIGS.
2K-2L.
[0144] FIGS. 2M-2N show a modified version of the trans-nasal
posterior occluder 301a which includes all of the elements
described above with respect to the trans-nasal posterior occluder
device 301 shown in FIGS. 2I-2L as well as a distal extension 303a
of the tube 303 that extends distal to the occluder 305 and an
additional proximal connector 319. A separate lumen (not shown)
extends from connector 319 through tube 303 and through distal tube
extension 303a, which terminates in a distal end opening 321.
Suction may thus be applied to connector 319 to suction matter
through distal opening 321, through the distal tube extension 303a
and through tube 303. This distal tube extension 303a and
additional lumen may be optionally added to any other the other
posterior occluder devices described herein in cases where doing so
would not render the device unsuitable for its intended
application.
[0145] FIGS. 2O-2P show an alternative posterior occluder system
400 that comprises an intranasal catheter 402 that is inserted into
a nasal cavity and an occluder catheter 404 that is inserted
through the intranasal catheter 402, as shown. A posterior occluder
406 is located at or near the distal end of the occluder catheter
404. In the particular embodiment shown in FIGS. 2O-2P, the
occluder 406 is sized and configured to occlude the posterior
choanae, nasopharynx or pharynx posterior to the nasal septum (but
typically superior to the glottis). In the particular example
shown, this occluder 406 comprises a balloon. However, such
occluder 406 may be constructed in various alternative ways,
examples of which are shown in FIGS. 3A-3K and described herebelow.
In this example a balloon inflation/deflation lumen may extend from
Luer connector 408, through occluder catheter 404 and to the
balloon-type proximal occluder 406. A syringe or other
inflation/deflation apparatus may be attached to the Luer connector
408 and used to inflate and deflate the balloon-type posterior
occluder 406. A stopcock or other valve (not shown) may also be
provided on the balloon inflation/deflation lumen to maintain
inflation of the balloon-type posterior occluder 406, when desired.
Optionally, distal tubular extension 412 may extend distally of the
posterior occluder 406 and a separate lumen may extend from an
optional second connector 410, through distal tubular extension 412
and through an opening 414 such that matter may also be aspirated
from the area distal to the posterior occluder 406. A port body 418
is formed on the proximal end of the intranasal tube 402. An
insertion port 420 extends through port body 418 into the lumen 422
of the intra nasal tube. A side suction port 416 may also be
connected to the lumen 422 of the intranasal tube 402. In routine
operation, the intranasal tube 402 is inserted through the nostril
into one nasal cavity and advanced to a position where its distal
end is within or near the posterior choanae or nasopharynx. With
the posterior occluder 406 in a collapsed (e.g., deflated)
configuration, the occluder catheter 404 is advanced through the
lumen 422 of the intranasal catheter 402 to a position where the
posterior occluder is located in the posterior choanae, nasopharynx
or pharynx posterior to the nasal septum (but typically superior to
the glottis). Thereafter, the posterior occluder 406 may be
expanded (e.g., inflated) such that it occludes or blocks the
posterior choanae, nasopharynx or pharynx posterior to the nasal
septum (but typically superior to the glottis), thereby
substantially preventing blood, other fluid or debris from draining
into the patient's esophagus or trachea during the procedure.
Thereafter, suction may be applied to suction port 416 to suction
blood, other fluid or debris from the area proximal to the
posterior occluder 406. During such suctioning, the intranasal tube
402 may be moved back and/or forth as indicated by arrows on FIG.
2O, while the occluder catheter 404 remains stationary. Such
ability to move the intranasal catheter 402 during the suctioning
process may facilitate complete removal of blood, other fluid
and/or debris from the operative field.
[0146] FIGS. 2Q and 2R show a modified posterior occluder system
430 which includes the same elements and components as the
posterior occluder system 400 described above, but wherein the
distal end 434 of the intranasal tube 402a is tapered and wherein a
plurality of side apertures 432 are formed in the intranasal tube
402a such that blood, other fluid or debris may be aspirated into
the lumen 422a of the intranasal tube 402a through such side
apertures 432.
[0147] B. Variations in Occluder Design and Suction Apparatus:
[0148] Although the above-described examples of occluder/access
devices 10, 12, 300, 400 show occluders that are in nature of
inflatable balloons, it will be appreciated that these occluders
are not limited to balloons and may be of various other designs and
types. Further, it is to be understood that various arrangements of
access and/or suction tubing/port(s) may be used to facilitate
complete removal of blood, fluid or other debris from the areas
adjacent to the occluder(s) and/or elsewhere in the operative field
or optimal positioning of working devices within the operative
field. In fact, certain occluder and/or suction-access tubing/port
designs may be more desirable for certain procedures than others
depending on a number of factors including the positioning of the
patient's head during surgery, whether the patient will be under a
general anesthetic, whether an endotracheal tube will be inserted,
etc. In some cases, where a posterior occluder is positioned within
the posterior choanae, nasopharynx or pharynx posterior to the
nasal septum the completeness with which blood, other fluid or
debris may be suctioned out of the area adjacent to that posterior
occluder may depend on the shape and/or design of the occluder
itself as well as the shape and location of the suction lumen(s)
and port(s) through which the blood, fluid or debris is to be
suctioned. Beyond optimized fluid control, the posterior occluder
and/or associated access tubing may also serve as an essential
guiding element for devices, and alternative shapes and
trajectories may be particularly useful to access specific
structures. FIGS. 3A-3K show examples of varied occluder types and
variations in the arrangements of suction lumen(s) and port(s)
through which the blood, fluid or debris may be suctioned from
areas adjacent to the occluder or elsewhere within the operative
field. The examples shown in FIGS. 3A and 3K may be incorporated
into the occluder & access devices shown in FIGS. 2A-2R, when
appropriate.
[0149] FIG. 3A shows an occluder 446 mounted on a tube 442, wherein
a generally "U" shaped curve is formed in the distal end of the
tube such that a distal portion of the tube 442 passes beneath the
upper surface 449 of the occluder 446 and curves upwardly such that
the distal end of the tube 442 terminates in an opening 444 that is
flush with the upper surface 449 of occluder 446. In this manner,
any fluid that has accumulated adjacent to the upper surface 449 of
occluder 446 may be suctioned into opening 444 and through tube
442. In embodiments where the occluder comprises a balloon, a
balloon inflation lumen may extend through the tube and open
through an opening 447 into the interior of the balloon, to permit
inflation/deflation of the balloon. Optionally, a working device
448, such as a flexible catheter or elongate apparatus examples of
which are shown in FIGS. 5A-5T and described herebelow, may also be
advanced through the suction lumen of tube 442 and out of opening
444 as indicated on FIG. 3A.
[0150] FIG. 3B shows another alternative wherein an occluder 450
has a depression or well 454 formed in its upper surface. A tube
452 is attached to the occluder by attachment members 456 and the
distal end of the tube 452 protrudes into well 454 such that any
blood, fluid or debris that collects within the well 454 may be
suctioned through the tube 452. In embodiments where the occluder
450 comprises a balloon, the tube 452 may incorporate a balloon
inflation/deflation lumen which may extend through an
inflation/deflation side tube 458 into the interior of the balloon
to facilitate inflation and deflation of the balloon.
[0151] FIGS. 3C and 3C' show another alternative wherein an
occluder 460 had a depression or well 462 formed in its upper
surface and a tube 464 is attached to the occluder 460, as shown. A
lumen of the tube 464 is in communication with the area adjacent
the floor of the well to facilitate suctioning of blood, fluid or
debris that collects within the well. In embodiments where the
occluder 460 comprises a balloon, the tube 464 may incorporate a
suction lumen 468 and a balloon inflation/deflation lumen 470. A
small curved (e.g., generally "U" shaped) suction tube 466 may be
connected in a sealed connection to the distal end of suction lumen
468 and the interior of the well 462 such that blood, other fluid
or debris may be suctioned from the well 462, through suction tube
466 and through suction lumen 468.
[0152] FIG. 3D shows a concave occluder 471 that comprises a self
expanding concave structure 472 such as a basket formed of a
superelastic or resilient mesh material (e.g., nickel titanium
alloy wire mesh). The expanding concave structure 472 is covered by
a fluid impermeable flexible covering 474 such as a skin formed of
flexible polymer (e.g., expanded polytetrafluoroethylene,
polyurethane, polyethylene teraphthalate, etc.). When fully
expanded the concave occluder 471 occludes the body lumen in which
it is positioned (e.g., the nasal cavity, posterior choanae,
nasopharynx, pharynx, etc.) and forms a concave well 479. A tube
480 extends into the well 479 of the concave occluder 471 and may
be used to suction blood, fluid or debris from the well 479. The
occluder 471 may be advanced from and withdrawn into a delivery
catheter 478. Struts 472 may connect the concave occluder 471 to a
delivery member (not shown) within the delivery catheter 478, such
delivery member being advanceable to push the occluder 471 out of
the delivery catheter 478 and retractable to withdraw the occluder
471 into the delivery catheter 478. When inside the delivery
catheter, the occluder 471 may be in a collapsed configuration but
when expelled out of the delivery catheter the occluder will
resiliently spring or self-expand to its expanded concave
configuration, as shown in FIG. 3D. The suction catheter 480 may
advance from and/or retract into the delivery catheter 478
concurrently with, or separately from, the occluder 471.
[0153] FIGS. 3E'-3E''' show yet another occluder/suction
arrangement wherein the occluder 484 comprises an everting tubular
member that is advanceable from a delivery/suction catheter 486.
The everting tubular member comprises a frame 488 that is covered
with a covering 500. Initially the everting tubular member is in a
substantially cylindrical configuration within the lumen of the
delivery/suction catheter 486. The frame may be a resilient or
superelastic material that is biased to the everted shape shown in
FIG. 3E'''. Such frame 488 may be formed of mesh material (e.g.,
nickel titanium alloy wire mesh). The covering 500 may be formed of
flexible polymer (e.g., expanded polytetrafluoroethylene,
polyurethane, polyethylene teraphthalate, etc.) In operation, the
delivery/suction catheter 486 is advanced to the position where it
is desired to place the occluder 484. Then, the everting tube is
advanced from the distal end opening of the delivery/suction tube
486, as shown in FIGS. 3E' and 3E''. As it advances out of the
catheter 486, the everting tube member assumes its everted
configuration, forming a concave occluder 484 as shown in FIG.
3E''', The occluder 484, when fully everted, occludes the body
lumen in which it is positioned (e.g., the nasal cavity, posterior
choanae, nasopharynx, pharynx, etc.) and creates a concave well
504. The delivery/suction catheter 486 may be advanced into the
concave well 504 such that any blood, fluid or debris that collects
within concave well 504 may be suctioned through suction ports 502
and through the distal end of the delivery/suction catheter
486.
[0154] FIG. 3F-3F''' show another embodiment wherein an occluder
510 is positioned on the end of a tube 512. The occluder 510 has an
arched upper surface such that a generally "V" shaped annular
collection space 518 is created in the region of the coaptation
between the occluder 510 and the adjacent wall of the body lumen in
which it is positioned (e.g., a nasal cavity, posterior choanae,
nasopharynx, pharynx, etc), A suction tube 516 extends from tube
512 into the annular collection space 518 and blood, other fluid or
debris that collects in the annular collection space 518 may be
suctioned through suction tube 516 and through a lumen of tube 512,
thereby providing for maintenance of a substantially dry
environment adjacent to the upper surface of the occluder 510. The
occluder 510 may comprise a balloon or any other suitable occlusion
member as described herein or known in the art. As shown in FIGS.
3F'-3F''' the suction tube 516 may comprise a simple tube having an
open distal end or, alternatively, the device may incorporate a
suction tube 516a that has a plurality of side apertures 520 formed
near its distal end and/or a suction tube 516 that has a guard
member 522, such as a screen, formed over its suction ports or
openings to deter solid matter (e.g., blood clots or other debris)
from clogging the suction ports or openings.
[0155] FIG. 3G shows an occluder 530 attached to a tube 532 that
has a curved (e.g., generally "U" shaped) distal end that does not
protrude into the interior of the occluder. Suction apertures 536
are formed in the distal portion of the tube 532 to permit blood,
fluid or debris that collects adjacent to the upper surface of the
occluder 530 to be suctioned through the tube 532. In embodiments
where the occluder is a balloon a balloon/inflation lumen may
extend through tube 532 and a small balloon inflation tube 538 may
extend into the interior of the balloon to permit the balloon to be
inflated and deflated. Optionally, in some embodiments, a separate
tube 540 may extend through tube 532 and trough occluder 530 to
provide access to the area distal to the occluder 530 for purposes
of suctioning, introduction of instruments, or other purposes.
[0156] FIG. 3H shows another embodiment wherein the occluder 546 is
connected to a tube or elongate member 550 and a suction tube 548
having an expanded (e.g., trumpet shaped) distal end is useable to
suction blood, fluid or debris from the area adjacent to the upper
surface of the occluder. As can be seen from FIG. 3H, where the
upper surface of the occluder is arched and annular collection
space may be created around the perimeter of the occluder 546 where
the occluder 546 coapts with the wall of the anatomical structure
in which it is positioned (e.g., a nasal cavity, posterior choanae,
nasopharynx, pharynx, etc.) and the expanded end 552 of the suction
tube 548 may be sized and shaped to receive the arched upper
surface of the occluder 546 and to suction any blood, fluid or
debris from that annular collection space. In embodiments where the
occluder is a balloon a balloon/inflation lumen may extend through
tube 548 and a small balloon inflation tube may extend into the
interior of the balloon to permit the balloon to be inflated and
deflated. Optionally, in some embodiments, a separate tube 550 may
extend through tube 548 and through occluder 546 to provide access
to the area distal to the occluder 546 for purposes of suctioning,
introduction of instruments or fluid injectors, or other
purposes.
[0157] FIG. 3I shows an embodiment wherein the occluder 570
comprises a mass of absorbent material such as a tampon (e.g.,
cotton, gauze, hydrogel or other material or composite of materials
that will absorb fluid and occlude the desired body lumen). In the
particular example shown, the occluder is advanced out of an
aperture 578 formed in a tube 572 that has a curved (e.g.,
generally "U" shaped) tip. Suction apertures 576 are formed in the
distal portion of the tube 572 to permit blood, fluid or debris
that collects adjacent to the upper surface of the occluder 570 to
be suctioned through the tube 572. After the procedure is complete
or the occlusion is no longer required, the tube 572 and
fluid-soaked occluder 570 may be withdrawn from the body without
retraction of the occluder 570 into the tube 572. Optionally, a
distal end opening 574 may be formed in tube 572 and such distal
end opening may be connected to the same lumen as openings 576 or a
separate lumen to the optional distal end opening 574 to be used
for suctioning, irrigation or introduction of a working device 580
such those shown in FIGS. 5A-5Y''''' and described herebelow.
[0158] FIG. 3J shows an occluder embodiment similar to that of the
device shown in FIGS. 2O and 2P and described hereabove. In this
embodiment, an occluder 600 is attached to a tube or elongate
member 604 and a suction tube 602 is movable back and forth over
the tube or elongate member 604 to suction blood, fluid or debris
from the area adjacent to the upper surface of the occluder 600 or
elsewhere in the body lumen in which the occluder 600 is
positioned. In embodiments where the occluder 600 is a balloon, a
balloon/inflation lumen may extend through tube or elongate member
604 and into the balloon to permit the balloon to be inflated and
deflated. Optionally, in some embodiments, a separate tube 606 may
extend trough tube or elongate member 604 and through occluder 600
to provide access to the area distal to the occluder 600 for
purposes of suctioning, introduction of instruments, or other
purposes.
[0159] FIG. 3K shows an occluder embodiment similar to that
incorporated into the device shown in FIGS. 2Q and 2R and described
hereabove. In this embodiment, an occluder 610 is attached to a
tube or elongate member 614 and a tapered suction tube 612 having
one or more suction apertures 616 formed therein is movable back
and forth over the tube or elongate member 614 to suction blood,
fluid or debris from the area adjacent to the upper surface of the
occluder 610 or elsewhere in the body lumen in which the occluder
600 is positioned. Of course, irrigation solution or other fluids
may also be delivered through such apertures 616 or through a
separate irrigation/infusion lumen that opens through separate
irrigation/infusion aperture(s) (not shown). In embodiments where
the occluder 610 is a balloon, a balloon/inflation lumen may extend
through tube or elongate member 614 and into the balloon to permit
the balloon to be inflated and deflated. Optionally, in some
embodiments, a separate tube 618 may extend trough tube or elongate
member 614 and through occluder 610 to provide access to the area
distal to the occluder 610 for purposes of suctioning, introduction
of instruments, or other purposes.
[0160] FIGS. 3L'-3L'' show yet another occluder/tubing device 1000
comprising an outer tube 1002 and an inner tube 1004 disposed
coaxially within the outer tube 1002. An outwardly bendable region
1006 is formed in the wall of the outer tube 1002 near its distal
end. The distal end of the outer tube 1002 is affixed to the inner
tube 1004. A passageway 1010 extends between the outer tube 1002
and inner tube 1004 and openings 1008 are formed in the wall of the
outer tube 1002. In routine operation, this device 1000 is
initially disposed in the configuration shown in FIG. 3L' and is
inserted into the desired passageway. Thereafter, the inner tube
1004 is pulled in the proximal direction while the outer tube 1002
is held stationary, thereby causing the outwardly bendable region
1006 to protrude outwardly as shown in FIG. 3L'' and resulting in
occlusion of the body lumen in which the distal portion of the
device 1000 is positioned. Suction may be applied to passageway
1010 to remove blood, fluid or other debris from the area adjacent
to the upper surface of 1007 of the outwardly protruding bendable
region 1006. In this regard, the openings 1008 may be formed close
to and/or even in the upper surface 1007 of the outwardly
protruding bendable region 1006.
[0161] FIGS. 3M' and 3M'' show another occluder/tubing device 1020
comprising an outer tube 1022 an inner tube 1024. The inner tube
1024 is advanceable out of the distal end of the outer tube 1022
and a distal portion of the inner tube 1024 expands as it emerges
from the inner tube, thereby forming an occluder that occludes the
body lumen or passageway in which it is positioned, as shown in
FIG. 3M''. Blood, other fluid or debris may be suctioned from the
area adjacent to the upper surface of the occluder through the open
distal end of the outer tube 1022 and/or through optional side
apertures 1026.
[0162] FIG. 4 shows a nasopharyngeal occluder/endotracheal tube
device 620 of the present invention inserted through the right
nasal cavity and into the trachea. This device 620 comprises a
curved tube 622 having a posterior occluder 626 positioned at or
near the distal end of the tube 622 and, optionally an anterior
occluder (shown in dotted lines on FIG. 4) formed near the proximal
end of the tube 622. An endotracheal tube 624 extends through
curved tube 622, through the posterior occluder and into the
patient's trachea. Optionally, a cuff 628 may be formed on
endotracheal tube 624 to provide a second substantially fluid tight
seal within the patient's trachea, inferior to the glottis. A hub
630 is formed on the proximal end of tube 622. A ventilator tube
634 extends from the hub and is connected to endotracheal tube 624
and is attachable to a ventilator, anesthesia machine, t-tube,
Ambu-bag, etc. In embodiments where the posterior occluder 626 is a
balloon, a posterior occluder inflation/deflation connector 632
extends from hub 630 and is connected to an inflation/deflation
lumen that extends through tube 622 for inflation/deflation of the
posterior occluder 626, A cuff inflation/deflation connector 634
may also extend from hub 630 and through the endotracheal tube 624
for inflation/deflation of the endotracheal tube cuff 628.
Optionally, suction and/or device insertion ports may also be
formed in hub 630, as described above in connection with other
occluder/access devices. In routine operation, this device 620 is
inserted to a position where the posterior occluder 626 occludes
the posterior choanae, nasopharynx or pharynx posterior to the
nasal septum (but typically superior to the glottis) and the
endotracheal tube 624 extends into the patient's trachea with the
optional cuff positioned in the trachea inferior to the
glottis.
[0163] C. Working Devices for Delivering Substances or for Cutting
Ablating, Remodeling or Expanding Bone or Soft Tissue
[0164] The present invention provides a variety of apparatus that
may be inserted into the nasal cavity, paranasal sinus, nasopharynx
or middle ear to perform diagnostic or therapeutic procedures.
These devices may be delivered through or incorporated into
flexible catheters or flexible rod-like shafts. Such flexible
construction allows these devices to be delivered and positioned to
perform the desired diagnostic or therapeutic procedures with
minimal trauma to other tissues, as can result from the insertion
of rigid scopes and rigid instruments in accordance with the
methodology of the prior art. It is within the scope of this
approach that these devices may be partially flexible or have rigid
portions and flexible portions to facilitate their control and
guidance to the appropriate region. Further, they may be used in
conjunction or combination with other standard rigid apparatus
(scopes, etc.) during some part of the procedure, if desired.
[0165] Also, in some but not necessarily all procedures, these
working devices (and/or the catheters used to deliver them) may be
inserted through lumens of the occluder & access devices 10,
12, 300, 301, 400, 430, etc. as shown in FIGS. 2A-2R and described
above. As stated earlier, it may also be desirable to focus the
access and occlusion to an even smaller territory, through
stand-alone guide catheters or subselective guide catheters with or
without balloons or other occluders.
[0166] Optionally, any of the working devices and guide catheters
described herein may be configured to receive or be advanced over a
guidewire unless to do so would render the device inoperable for
its intended purpose. Some of the specific examples described
herein include guidewires, but it is to be appreciated that the use
of guidewires and the incorporation of guidewire lumens is not
limited to only the specific examples in which guidewires or
guidewire lumens are shown. The guidewires used in this invention
may be constructed and coated as is common in the art of
cardiology. This may include the use of coils, tapered or
non-tapered core wires, radiopaque tips and/or entire lengths,
shaping ribbons, variations of stiffness, PTFE, silicone,
hydrophilic coatings, polymer coatings, etc. For the scope of this
inventions, these wires may possess dimensions of length between 5
and 75 cm and outer diameter between 0.005'' and 0.050''.
[0167] Also, some of the working devices shown in FIGS. 5A-5Y'''''
and described herein incorporate assemblies, components or
mechanisms (e.g., rotating cutters, radiofrequency electrodes,
electrocautery devices, receptacles for capturing matter,
cryosurgical apparatus, balloons, stents, radioactive or
substance-eluting coatings, snares, electro-anatomical mapping and
guidance, optical fibers, lenses and other endoscopic apparatus,
seals, hemostatic valves, etc. The designs and constructions of
such components and assemblies are will known in the art.
Non-limiting examples of some such designs and constructions are
set forth in U.S. Pat. No. 5,722,984 (Fischell et al.), U.S. Pat.
No. 5,775,327 (Randolph et al.), U.S. Pat. No. 5,685,838 (Peters,
et al.), U.S. Pat. No. 6,013,019 (Fischell et al.), U.S. Pat. No.
5,356,418 (Shturman), U.S. Pat. No. 5,634,908 (Loomas), U.S. Pat.
No. 5,255,679 (Imran), U.S. Pat. No. 6,048,299 (Hoffman), U.S. Pat.
No. 6,585,794 (Wright et al.), U.S. Pat. No. 6,503,185 (Waksman),
U.S. Pat. No. 6,669,689 (Lehmann et al.), U.S. Pat. No. 6,638,233
(Corvi et al.), U.S. Pat. No. 5,026,384 (Farr et al.), U.S. Pat.
No. 4,669,469 (Gifford et al.), U.S. Pat. No. 6,685,648 (Flaherty
et al.), U.S. Pat. No. 5,250,059 (Andreas et al.), U.S. Pat. No.
4,708,834 (Tsuno), U.S. Pat. No. 5,171,233 (Amplatz), U.S. Pat. No.
6,468,297 (Williams et al.) and U.S. Pat. No. 4,748,869
(Wardle).
[0168] As shown in the examples of FIGS. 5A-5Y''''' these working
devices include guide catheters, substance delivery catheters,
scopes, injectors, cutters, bone breaking apparatus, balloons and
other dilators, laser/thermal delivery devices, braces, implants,
stents, snares, biopsy tools, forceps, etc.
[0169] FIG. 5A shows a side suction and/or cutting catheter 70
comprising a flexible catheter body 72 having a side opening 74.
The catheter 72 is advanced into a passageway such as a nostril,
nasal cavity, meatus, ostium, interior of a sinus, etc. and
positioned so that the opening 74 is adjacent to matter (e.g., a
polyp, lesion, piece of debris, tissue, blood clot, etc.) that is
to be removed. Suction may be applied through a lumen of the
catheter 72 to suction the matter through the opening 74 and into
the catheter 72. In some cases, a cutter such as a rotating cutter,
linear slicer, pincher, laser beam, electrosurgical cutter, etc.
may be incorporated into the catheter 72 to assist in severing or
ablating tissue or other matter that has been positioned in the
side opening 74. This catheter may incorporate a deflectable tip or
a curved distal end which may force the opening of the catheter
against the tissue of interest. Further, this device 70 may have an
optional stabilizing balloon (similar to that shown in FIG. 5M and
described herebelow) incorporated on one side of the catheter 72 to
press it against the tissue of interest and may also contain one or
more on-board imaging modalities such as ultrasound, fiber or
digital optics, OCT, RF or electromagnetic sensors or emitters,
etc.
[0170] FIG. 5B shows an injector catheter 76 that comprises a
flexible catheter shaft 78 having one or more injector(s) 80 that
are advanceable into tissue or other matter that is located in or
on the wall of the body lumen in which the catheter 78 is
positioned. The catheter 78 is advanced, with the injector(s)
retracted into the catheter body, through a passageway such as a
nostril, nasal cavity, meatus, ostium, interior of a sinus, etc.
and positioned adjacent the area to which a diagnostic or
therapeutic substance is to be injected. Thereafter, the
injector(s) are advanced into the adjacent tissue or matter and the
desired substance is injected. Energy, such as laser, RF, thermal
or other energy may be delivered through these injectors 80 or
energy emitting implants (such as gamma or beta radioactive seeds)
may also be delivered through these injectors 80, either alone or
in combination with a fluid carrier or other substance such as a
diagnostic or therapeutic substance (as defined herein), It will be
noted that this device 76 as well as other working devices and
methods of the present invention (including the various implantable
devices described herein) are useable to deliver diagnostic or
therapeutic substances. The term "diagnostic or therapeutic
substance" as used herein is to be broadly construed to include any
feasible drugs, prodrugs, proteins, gene therapy preparations,
cells, diagnostic agents, contrast or imaging agents, biologicals,
etc. For example, in some applications where it is desired to treat
or prevent a microbial infection, the substance delivered may
comprise pharmaceutically acceptable salt or dosage form of an
antimicrobial agent (e.g., antibiotic, antiviral, antiparacytic,
antifungal, etc.).
[0171] Some nonlimiting examples of antimicrobial agents that may
be used in this invention include acyclovir, amantadine,
aminoglycosides (e.g., amikacin, gentamicin and tobramycin),
amoxicillin, amoxicillin/Clavulanate, amphotericin B, ampicillin,
ampicillin/sulbactam, atovaquone, azithromycin, cefazolin,
cefepime, cefotaxime, cefotetan, cefpodoxime, ceftazidime,
ceftizoxime, ceftriaxone, cefuroxime, cefuroxime axetil,
cephalexin, chloramphenicol, clotrimazole, ciprofloxacin,
clarithromycin, clindamycin, dapsone, dicloxacillin, doxycycline,
erythromycin, fluconazole, foscarnet, ganciclovir, atifloxacin,
imipenem/cilastatin, isoniazid, itraconazole, ketoconazole,
metronidazole, nafcillin, nafcillin, nystatin, penicillin,
penicillin G, pentamidine, piperacillin/tazobactam, rifampin,
quinupristin-dalfopristin, ticarcillin/clavulanate,
trimethoprim/sulfamethoxazole, valacyclovir, vancomycin, mafenide,
silver sulfadiazine, mupirocin, nystatin, triamcinolonelnystatin,
clotrimazole/betamethasone, clotrimazole, ketoconazole,
butoconazole, miconazole, tioconazole, detergent-like chemicals
that disrupt or disable microbes (e.g., nonoxynol-9, octoxynol-9,
benzalkonium chloride, menfegol, and N-docasanol); chemicals that
block microbial attachment to target cells and/or inhibits entry of
infectious pathogens (e.g., sulphated and sulponated polymers such
as PC-515 (carrageenan), Pro-2000, and Dextrin 2 Sulphate);
antiretroviral agents (e.g., PMPA gel) that prevent retroviruses
from replicating in the cells; genetically engineered or naturally
occurring antibodies that combat pathogens such as anti-viral
antibodies genetically engineered from plants known as
"plantibodies;" agents which change the condition of the tissue to
make it hostile to the pathogen (such as substances which alter
mucosal pH (e.g., Buffer Gel and Acidform) or non-pathogenic or
"friendly" bacteria or other microbes that cause the production of
hydrogen peroxide or other substances that kill or inhibit the
growth of pathogenic microbes (e.g., lactobacillus). As may be
applied to any of the substances listed previously or below, these
substances may be combined with any one or more drug-releasing
devices or molecular constructs such as polymers, collagen, gels,
implantable osmotic pump devices, etc. to permit their release over
an extended period of time once deposited. Further, these
substances may also be combined with any of the implantable
structural devices described below (stents, expanders, etc.) to
reduce infection, encrustation, or encapsulation of the implant
itself, or to allow the drug to be deposited in the optimal
location mucosally, sub-mucosally or into the bone. Examples of
implantable substance delivery devices useable in this invention
include those shown in FIGS. 5Y'-5Y''''' and described
herebelow.
[0172] Additionally or alternatively, in some applications where it
is desired to treat or prevent inflammation the substances
delivered in this invention may include various steroids. For
example, corticosteroids that have previously administered by
intranasal administration may be used, such as beclomethasone
(Vancenase.RTM. or Beconase.RTM.), flunisolide (Nasalide.RTM.),
fluticasone (Flonase.RTM.), triamcinolone (Nasacort.RTM.) and
mometasone (Nasonex.RTM.). Also, other steroids that may be useable
in the present invention include but are not limited to
aclometasone, desonide, hydrocortisone, betamethasone,
clocortolone, desoximetasone, fluocinolone, flurandrenolide,
mometasone, prednicarbate; amcinonide, desoximetasone, diflorasone,
fluocinolone, fluocinonide, halcinonide, clobetasol, augmented
betamethasone, diflorasone, halobetasol, prednisone, dexamethasone
and methylprednisolone,
[0173] Additionally or alternatively, in some applications, such as
those where it is desired to treat or prevent an allergic or immune
response, the substances delivered in this invention may include a)
various cytokine inhibitors such as humanized anti-cytokine
antibodies, anti-cytokine receptor antibodies, recombinant (new
cell resulting from genetic recombination) antagonists, or soluble
receptors; b) various leucotriene modifiers such as zafirlukast,
montelukast and zileuton; c) immunoglobulin E (IgE) inhibitors such
as Omalizumab (an anti-IgE monoclonal antibody formerly called rhu
Mab-E25) and secretory leukocyte protease inhibitor).
[0174] Additionally or alternatively, in some applications, such as
those where it is desired to shrink mucosal tissue, cause
decongestion or effect hemostasis, the substances delivered in this
invention may include various vasoconstrictors for decongestant and
or hemostatic purposes including but not limited to
pseudoephedrine, xylometazoline, oxymetazoline, phenylephrine,
epinephrine, etc.
[0175] Additionally or alternatively, in some applications, such as
those where it is desired to facilitate the flow of mucous, the
substances delivered in this invention may include various
mucolytics or other agents that modify the viscosity or consistency
of mucous or mucoid secretions, including but not limited to
acetylcysteine (Mucomyst.TM., Mucosil.TM.) and guaifenesin.
[0176] Additionally or alternatively, in some applications such as
those where it is desired to prevent or deter histamine release,
the substances delivered in this invention may include various mast
cell stabilizers or drugs which prevent the release of histamine
such as cromolyn (e.g., Nasal Chrom.RTM.) and nedocromil.
[0177] Additionally or alternatively, in some applications such as
those where it is desired to prevent or inhibit the effect of
histamine, the substances delivered in this invention may include
various antihistamines such as azelastine (e.g., Astylin.RTM.),
diphenhydramine, loratidine, etc.
[0178] Additionally or alternatively, in some embodiments such as
those where it is desired to dissolve, degrade, cut, break or
remodel bone or cartilage, the substances delivered in this
invention may include substances that weaken or modify bone and/or
cartilage to facilitate other procedures of this invention wherein
bone or cartilage is remodeled, reshaped, broken or removed. One
example of such an agent would be a calcium chelator such as EDTA
that could be injected or delivered in a substance delivery implant
next to a region of bone that is to be remodeled or modified.
Another example would be a preparation consisting or containing
bone degrading cells such as osteoclasts. Other examples would
include various enzymes of material that may soften or break down
components of bone or cartilage such as collagenase (CGN), trypsin,
trypsin/EDTA, hyaluronidase, and tosyllysylchloromethane
(TLCM).
[0179] Additionally or alternatively, in some applications, the
substances delivered in this invention may include other classes of
substances that are used to treat rhinitis, nasal polyps, nasal
inflammation, and other disorders of the ear, nose and throat
including but not limited to anticolinergic agents that tend to dry
up nasal secretions such as ipratropium (Atrovent Nasal.RTM.), as
well as other agents not listed here.
[0180] Additionally or alternatively, in some applications such as
those where it is desired to draw fluid from polyps or edematous
tissue, the substances delivered in this invention may include
locally or topically acting diuretics such as furosemide and/or
hyperosmolar agents such as sodium chloride gel or other salt
preparations that draw water from tissue or substances that
directly or indirectly change the osmolar content of the mucous to
cause more water to exit the tissue to shrink the polyps directly
at their site.
[0181] Additionally or alternatively, in some applications such as
those wherein it is desired to treat a tumor or cancerous lesion,
the substances delivered in this invention may include antitumor
agents (e.g., cancer chemotherapeutic agents, biological response
modifiers, vascularization inhibitors, hormone receptor blockers,
cryotherapeutic agents or other agents that destroy or inhibit
neoplasia or tumorigenesis) such as; alkylating agents or other
agents which directly kill cancer cells by attacking their DNA
(e.g., cyclophosphamide, isophosphamide), nitrosoureas or other
agents which kill cancer cells by inhibiting changes necessary for
cellular DNA repair (e.g., carmustine (BCNU) and lomustine (CCNU)),
antimetabolites and other agents that block cancer cell growth by
interfering with certain cell functions, usually DNA synthesis
(e.g., 6 mercaptopurine and 5-fluorouracil (5FU), antitumor
antibiotics and other compounds that act by binding or
intercalating DNA and preventing RNA synthesis (e.g., doxorubicin,
daunorubicin, epirubicin, idarubicin, mitomycin-C and bleomycin)
plant (vinca) alkaloids and other anti-tumor agents derived from
plants (e.g., vincristine and vinblastine), steroid hormones,
hormone inhibitors, hormone receptor antagonists and other agents
which affect the growth of hormone-responsive cancers (e.g.,
tamoxifen, herceptin, aromatase ingibitors such as
aminoglutethimide and formestane, trriazole inhibitors such as
letrozole and anastrazole, steroidal inhibitors such as
exemestane), antiangiogenic proteins, small molecules, gene
therapies and/or other agents that inhibit angiogenesis or
vascularization of tumors (e.g., meth-1, meth-2, thalidomide),
bevacizumab (Avastin), squalamine, endostatin, angiostatin,
Angiozyme, AE-941 (Neovastat), CC-5013 (Revimid), medi-522
(Vitaxin), 2-methoxyestradiol (2ME2, Panzem), carboxyamidotriazole
(CAI), combretastatin A4 prodrug (CA4P), SU6668, SU11248,
BMS-275291, COL-3, EMD 121974, IMC-1011, IM862, TNP-470, celecoxib
(Celebrex), rofecoxib (Vioxx), interferon alpha, interleukin-12
(IL-12) or any of the compounds identified in Science Vol. 289,
Pages 1197-1201 (Aug. 17, 2000) which is expressly incorporated
herein by reference, biological response modifiers (e.g.,
interferon, bacillus calmette-guerin (BCG), monoclonal antibodies,
interluken 2, granulocyte colony stimulating factor (GCSE), etc.),
PGDF receptor antagonists, herceptin, asparaginase, busulphan,
carboplatin, cisplatin, carmustine, chlorambucil, cytarabine,
dacarbazine, etoposide, flucarbazine, flurouracil, gemcitabine,
hydroxyurea, ifosphamide, irinotecan, lomustine, melphalan,
mercaptopurine, methotrexate, thioguanine, thiotepa, tomudex,
topotecan, treosulfan, vinblastine, vincristine, mitoazitrone,
oxaliplatin, procarbazine, streptocin, taxol, taxotere,
analogs/congeners and derivatives of such compounds as well as
other antitumor agents not listed here.
[0182] Additionally or alternatively, in some applications such as
those where it is desired to grow new cells or to modify existing
cells, the substances delivered in this invention may include cells
(mucosal cells, fibroblasts, stem cells or genetically engineered
cells) as well as genes and gene delivery vehicles like plasmids,
adenoviral vectors or naked DNA, mRNA, etc. injected with genes
that code for anti-inflammatory substances, etc., and, as mentioned
above, osteoclasts that modify or soften bone when so desired.
[0183] Additionally or alternatively to being combined with a
device and/or a substance releasing modality, it may be ideal to
position the device in a specific location upstream in the mucous
flow path (i.e. frontal sinus or ethmoid cells). This could allow
the deposition of fewer drug releasing devices, and permit the
"bathing" of all the downstream tissues with the desired drug. This
utilization of mucous as a carrier for the drug may be ideal,
especially since the concentrations for the drug may be highest in
regions where the mucous is retained; whereas non-diseased regions
with good mucouse flow will be less affected by the drug. This
could be particularly useful in chronic sinusitis, or tumors where
bringing the concentration of drug higher at those specific sites
may have greater therapeutic benefit. In all such cases, local
delivery will permit these drugs to have much less systemic impact.
Further, it may be ideal to configure the composition of the drug
or delivery system such that it maintains a loose affinity to the
mucous permitting it to distribute evenly in the flow. Also, in
some applications, rather than a drug, a solute such as a salt or
other mucous soluble material may be positioned at a location
whereby mucous will contact the substance and a quantity of the
substance will become dissolved in the mucous thereby changing some
property (e.g., pH, osmolarity, etc) of the mucous. In some cases,
this technique may be used to render the mucous hyperosmolar so
that the flowing mucous will draw water from polyps, edematous
mucosal tissue, etc. thereby providing a desiccating therapeutic
effect.
[0184] Additionally or alternatively to substances directed towards
local delivery to affect changes within the sinus cavity, the nasal
cavities provide unique access to the olfactory system and thus the
brain. Any of the devices and methods described herein may also be
used to deliver substances to the brain or alter the functioning of
the olfactory system. Such examples include, the delivery of energy
or the deposition of devices and/or substances and/or substance
delivering implant(s) to occlude or alter olfactory perception, to
suppress appetite or otherwise treat obesity, epilepsy (e.g.,
barbiturates such as phenobarbital or mephoobarbital;
iminostilbenes such as carbamazepine and oxcarbazepine;
succinimides such as ethylsuximide; valproic acid; benzodiazepines
such as clonazepam, clorazepate, diazepam and lorazepam,
gabapentin, lamotrigine, acetazolamide, felbamate, levetiraceam,
tiagabine, topiramate, zonisamide, etc.), personality or mental
disorders (e.g., antidepressants, antianxiety agents,
antipsychotics, etc.), chronic pain, Parkinson's disease (e.g.,
dopamine receptor agonists such as bromocriptine, pergolide,
ropinitrol and pramipexole; dopamine precursors such as levodopa;
COMT inhibitors such as tolcapone and entacapone; selegiline;
muscarinic receptor antagonists such as trihexyphenidyl,
benztropine and diphenhydramine) and Alzheimer's, Huntington's
Disease or other dementias, disorders of cognition or chronic
degenerative diseases (e.g. tacrine, donepezil, rivastigmine,
galantamine, fluoxetine, carbamazepine, clozapine, clonazepam and
proteins or genetic therapies that inhibit the formation of
beta-amyloid plaques), etc.
[0185] FIG. 5C shows a device 82 that comprises a rotating shaft 84
having a drill, auger or burr 86 that is useable to drill, bore,
grind or cut through tissue, bone, cartilage or other matter. This
device 82 may deployed as shown or, alternatively, the device 82
may be inserted through a small mucosal incision to preserve the
overlying mucosal lining while removing or boring into the bone or
cartilage below the mucosal lining.
[0186] FIG. 5D shows a guided injector catheter device 88 for
delivering a diagnostic or therapeutic substance as defined above.
This device 88 comprises a flexible catheter 90 having an imaging
apparatus 96 thereon and an injector 92 that is advanceable from
and retractable into the catheter 90. The imaging apparatus 96 is
useable to image the target location 94 at which the substance is
to be deposited and to enable orientation of the catheter 88 such
that, when the injector 92 is advanced from the catheter 88, the
injector 92 will travel to the desired target location 94. Examples
of such catheter 88 are described in U.S. Pat. No. 6,195,225
(Makower), U.S. Pat. No. 6,544,230 (Flaherty et al.), U.S. Pat. No.
6,375,615 (Flaherty et al.), U.S. Pat. No. 6,302,875 (Makower et
al), U.S. Pat. No. 6,190,353 (Makower et al.) and U.S. Pat. No.
6,685,648 (Flaherty et al.), the entireties of which are expressly
incorporated herein by reference.
[0187] FIG. 5E shows a balloon catheter device 98 comprising a
flexible catheter 100 having a balloon 102 thereon. The catheter
device 98 is advanced, with balloon 102 deflated, into a passageway
such as a nostril, nasal cavity, meatus, ostium, interior of a
sinus, etc. and positioned with the deflated balloon 102 situated
within an ostium, passageway or adjacent to tissue or matter that
is to be dilated, expanded or compressed (e.g., to apply pressure
for hemostasis, etc.). Thereafter, the balloon 102 may be inflated
to dilate, expand or compress the ostium, passageway, tissue or
matter. Thereafter the balloon 102 may be deflated and the device
98 may be removed. This balloon 102 may also be coated, impregnated
or otherwise provided with a medicament or substance that will
elute from the balloon into the adjacent tissue (e.g., bathing the
adjacent tissue with drug or radiating the tissue with thermal or
other energy to shrink the tissues in contact with the balloon
102). Alternatively, in some embodiments, the balloon may have a
plurality of apertures or openings through which a substance may be
delivered, sometimes under pressure, to cause the substance to
bathe or diffuse into the tissues adjacent to the balloon.
Alternatively, in some embodiments, radioactive seeds, threads,
ribbons, gas or liquid, etc. may be advanced into the catheter
shaft 100 or balloon 102 or a completely separate catheter body for
some period of time to expose the adjacent tissue and to achieve a
desired diagnostic or therapeutic effect (e.g. tissue shrinkage,
etc.).
[0188] FIG. 5F shows a balloon/cutter catheter device 104
comprising a flexible catheter 106 having a balloon 108 with one or
more cutter blades 110 formed thereon. The device 104 is advanced,
with balloon 108 deflated, into a passageway such as a nostril,
nasal cavity, meatus, ostium, interior of a sinus, etc. and
positioned with the deflated balloon 108 situated within an ostium,
passageway or adjacent to tissue or matter that is to be dilated,
expanded or compressed and in which it is desired to make one or
more cuts or scores (e.g. to control the fracturing of tissue
during expansion and minimize tissue trauma etc.). Thereafter, the
balloon 108 may be inflated balloon to dilate, expand or compress
the ostium, passageway, tissue or matter and causing the cutter
blade(s) 110 to make cut(s) in the adjacent tissue or matter.
Thereafter the balloon 108 may be deflated and the device 104 may
be removed. The blade may be energized with mono or bipolar RF
energy or simply be thermally heated to part the tissues in a
hemostatic fashion, as well as cause contraction of collagen fibers
or other connective tissue proteins, remodeling or softening of
cartilage, etc.
[0189] FIGS. 5G'-5G''' show a device 160 and method for delivery of
a pressure expandable stent 166. This device 160 comprises a
flexible catheter 162 having a balloon 164 thereon. Initially, as
shown in FIG. 5G', the balloon 164 is deflated and the stent 166 is
radially compressed to a collapsed configuration, around the
deflated balloon 164. The catheter 162 with the balloon 164
deflated and the collapsed stent 166 mounted thereon is advanced
into a passageway such as a nostril, nasal cavity, meatus, ostium,
interior of a sinus, etc. that is to be stented. Thereafter, the
balloon 164 is inflated causing the stent 166 to expand to a size
that frictionally engages the surrounding tissue so as to hold the
stent 166 in place, as shown in FIG. 5G''. In some instances the
procedure will be performed for the purpose of enlarging a
passageway (e.g., an ostium, meatus, etc.) and the stent 166 will
be expanded to a diameter that is sufficiently large to cause the
desired enlargement of the passageway and the stent will then
perform a scaffolding function, maintaining the passageway in such
enlarged condition. After the stent 166 has been fully expanded and
implanted, the balloon 164 may be deflated and the catheter 162
removed as shown in FIG. 5G'''. In some applications, the stent may
contain a diagnostic or therapeutic substance as defined herein and
such substance may elute from the stent 166 into the surrounding
tissue to bring about a desired diagnostic or therapeutic effect.
In some cases, the stent 166 may be permanently implanted. In other
cases the stent 166 may be temporarily implanted. In cases where
the stent 166 is temporarily implanted, it may be removed in a
second procedure conducted to retrieve the stent 166 or the stent
166 may be made of bioabsorbable or biodegradable material such
that it degrades or is absorbed within a desired period of time
after implantation. In some cases, such as when the stent is to be
placed within the ostium of a paranasal sinus, the stent and/or the
balloon may be specifically shaped to facilitate and/or cause the
stent 166 to seat in a desired position and to prevent unwanted
slippage of the stent 166. For example, the stent 166 and/or
balloon 164 may have an annular groove formed about the middle
thereof or may be hourglass or venture shaped, to facilitate
seating of the stent 166 within an ostium or orifice without
longitudinal slippage of the stent 166. In some cases it may be
desirable to leave a tether or suture attached to the stent 166 to
allow for simple removal of the stent 166 in the physician's office
or other suitable location. In some cases the procedure may be
intended to actually break bone (e.g., where the stent is intended
to dilate or enlarge a sinus ostium). Thus, the balloon 164 may be
made of polymeric material including, but not limited to flexible
polyvinyl chloride (PVC), polyethylene terephthalate (PET),
cross-linked polyethylene, polyester, polyamide, polyolefin,
polyurethane and silicone. Various balloon properties (strength,
flexibility, thickness, etc.) may be modified by, but not limited
to, blending, layering, mixing, co-extruding, irradiating, and
other means of engineering balloon material(s). This allows for the
use of compliant balloons that can conform to the surrounding
structure or non-compliant balloons that can deform or break the
surrounding structures (e.g., bone).
[0190] FIG. 5H shows an electrosurgical device 208 comprising a
flexible shaft 210 (e.g., a catheter or solid shaft) having arched
strut members 214 attached thereto. Electrodes 216 are located on
the strut members 214. In some cases, the strut members may be of
fixed configuration and in other cases the strut members 214 may be
collapsible and expandable. In operation, the device 208 is
advanced into a passageway such as a nostril, nasal cavity, meatus,
ostium, interior of a sinus, etc. Thereafter, current is applied to
the electrodes 216 causing tissue adjacent to the struts 214 to be
cauterized or heated. The electrodes 216 may be bipolar, monopolar
or facilitated by any other suitable form of energy such as a gas
or plasma arc. Additionally, sensing elements may also be attached
to the catheter and/or strut members to monitor various parameters
of the catheter and/or surrounding tissue (e.g., temperature,
etc.). In instances where monopolar electrodes are used, a separate
antenna electrode (not shown) will be applied to the patient's body
in accordance with processes and techniques that are well known in
the art.
[0191] FIG. 5I shows a device 218 that delivers a flow 222 of
material (e.g., cryogenic material, diagnostic or therapeutic
agent, etc.) or energy (laser light, infrared light, etc.) to the
tissues adjacent to the passage or body cavity in which the device
218 is positioned. This device comprises a flexible catheter 220
with an outlet aperture or lens at or near its distal end, through
which the flow of material or energy is delivered. This device may
be used to cryogenically freeze polyps or other tissues or to
deliver laser energy to turbinates or other tissues for the purpose
of ablating the tissue or to heat the tissue to a temperature that
results in shrinking of the tissue.
[0192] FIG. 5J shows an implantable pressure exerting device 224
that is implantable within a passageway such as a nostril, nasal
cavity, meatus, ostium, interior of a sinus, etc. to exert pressure
on bone, cartilage, soft tissue, etc. Examples of situations where
it is desirable to apply such pressure to an anatomical structure
include those wherein it is desired to splint or maintain
approximation of a broken bone or those wherein it is desired to
cause remodeling or gradual repositioning or reshaping of bone,
cartilage, soft tissue or other structures. This implantable device
224 comprises a pressure exerting member 228 and two or more plate
members 226. The device 224 is initially constrained in a collapsed
configuration wherein the pressure exerting member 228 is
compressed or collapsed and the device 224 is advanced into a
passageway such as a nostril, nasal cavity, meatus, ostium,
interior of a sinus, etc. where it is desired to apply pressure to
an anatomical structure. When the device 224 is in the desired
position, the pressure exerting member 228 is expanded or elongated
to exert outward pressure on the plate members 226 and onto the
anatomical structures against which the plate members 226 are
positioned. In some embodiments, the pressure exerting member may
comprise a spring. In other embodiments, the pressure exerting
member may comprise a ratchet, hydraulic cylinder or other
mechanical apparatus that may be adjusted to create a desired
amount of pressure on the plate members 226. In some applications,
the pressure exerting member 228 may be adjustable in situ (i.e.,
with the device implanted in the body) so as to allow the operator
to periodically change the amount of pressure being applied to the
anatomical structures of interest (e.g., the operator may change to
position of a ratchet or add fluid to a hydraulic cylinder) thereby
bringing about gradual remodeling or movement of an anatomical
structure in a manner similar to that achieved during dental
orthodontia, Thus, this pressure exerting device 224 has broad
applicability in a variety of procedures including those intended
to enlarge a sinus ostium or to straighten an intranasal
septum.
[0193] FIGS. 5K-5K' and 5L show a forward rotary cutting catheter
device 700 that comprises a flexible outer tube 702 and a flexible
inner tube 704 disposed coaxially and rotatably mounted within the
outer tube 702. One or more bearings 708 (e.g., a helical bearing
or a series of individual cylindrical bearings) may be disposed
between the outer tube 702 and inner tube 704, as shown.
Alternatively, one or both apposing tube surfaces may be made of,
lined with, or be coated by etc. a lubricious material such as
silicone or PTFE to facilitate movement. A rotating cutter 706 is
positioned on the distal end of the inner tube 704. In operation,
as shown in FIG. 5K', the device 700 is advanced through a
passageway such as a nostril, nasal cavity, meatus, ostium,
interior of a sinus, etc. to a position where the distal end of the
device 700 is positioned just behind some obstructive matter, such
as a polyp P. The inner tube 704 and its cutter 706 are rotated as
the device is advanced into the obstructive matter P and/or suction
is applied through the lumen of the inner tube 704 and/or through
the lumen of the outer tube 702 to draw the obstructive matter P
into contact with the rotating cutter 706. It is to be appreciated
that, although this embodiment shows a rotating cutter 706, various
other types of cutters such as lasers, radiofrequency cutters and
other mechanical cutters, etc. may be used instead. As the
obstructive matter P is severed by the rotating cutter 706 the
obstructive matter P or pieces thereof may be suctioned through the
lumen of the inner tube 704 and/or through the lumen of the outer
tube 702. In some applications, as shown in FIG. 5L, a scope or
guidewire 710 may extend through the lumen of the inner tube to
facilitate advancement and positioning of the device 700 prior to
the removal of the obstructive matter P.
[0194] FIGS. 5M and 5N show a side rotary cutting device 714
comprising a flexible outer tube 718 and a flexible inner tube 722
that is disposed coaxially and rotatably mounted within the outer
tube 718. One or more bearings 730 (e.g., a helical bearing or a
series of individual cylindrical bearings) may be disposed between
the outer tube 718 and inner tube 722, as shown. Alternatively, one
or both apposing tube surfaces may be made of, lined with, or be
coated by etc. a lubricious material such as silicone or PTFE to
facilitate movement. A rotating cutter 724 is positioned on the
distal end of the inner tube 722. A side opening 720 is formed in
the outer tube 718 and the cutter 724 is positioned proximal to the
side opening 720. A pull member 728 extends through the inner tube
722 and is attached to a retractor head 726. In operation, the
device 714 is advanced and/or torqued to a position where the side
opening 720 is near a polyp, tissue or other obstructive matter to
be removed. The inner tube 722 and its cutter 724 are rotated. In
some applications, suction may be applied through the inner tube
722 and/or through the lumen of the outer tube 718 to draw the
obstructive matter into the side opening 720. The pull member 728
is pulled in the proximal direction, causing the retractor head 726
to retract or pull the obstructive matter into contact with the
rotating cutter 724. As the obstructive matter is severed by the
rotating cutter, the severed obstructive matter or pieces thereof
may be suctioned through the lumen of the inner tube 722 and/or
through the lumen of the outer tube 718. The pull member 728 may
then be advanced in the distal direction to return the retractor
head 726 to its original position as shown in FIGS. 5M and 5N. An
optional balloon 719 or other laterally extendable member may be
located on the side of the catheter 718 opposite the side opening
720 to push the side opening 720 against a lumen wall or into the
direction of a polyp or other tissue to be removed. Alternatively,
the catheter may incorporate a deflectable tip or a curved distal
end that may force the side opening of the catheter against a lumen
wall or into the direction of a polyp or other tissue to be
removed. With specific reference to FIG. 5N, there is shown a side
rotary cutting device 714a that includes all of the elements of the
device 714 shown in FIG. 5M, but includes a side lumen 731. A scope
may be permanently positioned within this side lumen 731 or a scope
may be temporarily inserted into (or through) the side lumen 731 to
enable the operator to view the area near the side opening 720 and
to facilitate the advancement and positioning of the device 714A.
Also, the side lumen 731 may function as a guidewire lumen to allow
the device 714A to be advanced over a guidewire.
[0195] It is to be understood that any of the devices described
within this document may be further modified to include any one of
the following devices within its structure: electromagnetic
positioning sensor/detector (Biosense/JNJ, Surgical Navigation
Technologies/Medtronic, Calypso Medical), RF sensor/transmitter,
magnetic direction localizer (Stereotaxis, Inc.), thermal sensor,
radiopaque composition, radioactive detection emitter/sensor,
ultrasonic scanner/transmitter/receiver, Doppler scanner,
electrical stimulator, fiber optic, digital optic, local diagnostic
chip containing elements responsive to the presence or absence of
certain substances and therefore having the ability to diagnose the
presence of fungus, microbes, viruses, blood, abnormal mucous
content, cancer cells, drugs of abuse, genetic abnormalities,
metabolic bi-products, etc.
[0196] It is to be further understood that any and all of the
devices described in this patent application may incorporate, or
may be used in conjunction with, endoscopes. Such endoscopes will
typically include light transmitting optical fibers for casting
light in the area to be viewed by the scope and image transmitting
optical fibers for carrying an image received by the scope to an
eyepiece or monitor device located outside the patient's body. In
some embodiments a scope, such as a disposable and/or flexible
scope, may be affixed to the working device. Examples of such
endoscopes that are suitable for incorporation into the working
devices of this invention include that described in U.S. Pat. Nos.
4,708,434; 4,919,112; 5,127,393; 5,519,532; 5,171,233, 5,549,542,
6,551,239 and 6,572,538 as well as published United States Patent
Application No. 2001/0029317A1, the entireties of which are
expressly incorporated herein by reference.
[0197] It is to be further understood that any catheters or
elongate flexible devices of this invention may include design
elements that impact performance features which include, but are
not limited to, durability, flexibility, stiffness, length,
profile, lubricity, trackability, steerability, torqueability,
deflectability, guidance, and radiopacity. Design elements can
include, but are not limited to, use of various polymers and
metals, use of varying durometer materials to establish a desired
flexibility gradient along the device,
blending/mixing/layering/co-extruding etc. various materials, using
bearings or lubricious coatings or lubricious materials (e.g.,
silicone, PTFE, parylene, polyethene, etc.) where two or more
surfaces will move relative to each other (e.g., guidewire or
instrument lumen, deflecting tendon in lumen, etc.), use of
braiding or springs to increase torque control over the device,
using materials (e.g. barium, tantalum, etc.) to increase polymer
radiopacity, and use of elements to predictably deflect various
sections of the catheter (e.g., tension straps or wires, shape
memory alloys such as nitinol, etc.).
[0198] It is to be further understood that any of the catheters,
scopes, elongate working devices or other devices disclosed in this
patent application may be rendered steerable or volitionally
bendable, unless to do so would make such device inoperative for
its intended purpose. Steerable catheters and scopes are well known
in the art and may utilize mechanical steering assemblies (e.g.,
pull wires, hinges, etc.) or shape memory materials (e.g., nickel
titanium alloys, shape memory polymers, etc.) to induce the device
to undergo the desired bending or curvature after it has been
inserted into the body. Examples of apparatus and construction that
may be used to render these devices steerable or volitionally
bendable include but are not limited to those described in U.S.
Pat. No. 5,507,725 (Savage et al.), U.S. Pat. No. 5,656,030 (Hunjan
et al.), U.S. Pat. No. 6,183,464 (Webster), U.S. Pat. No. 5,251,092
(Qin et al.), U.S. Pat. No. 6,500,130 (Kinsella et al.), U.S. Pat.
No. 6,571,131 (Nguyen), U.S. Pat. No. 5,415,633 (Lazarus et al.),
U.S. Pat. No. 4,998,916 (Hammerslag et al.), U.S. Pat. No.
4,898,577 (Badger et al.), U.S. Pat. No. 4,815,478 (Buchbinder et
al.) and published United States Patent Applications No.
2003/0181827A1 (Hojeibane et al.) and 2003/0130598A1 (Manning et
al.), the entireties of which are expressly incorporated herein by
reference.
[0199] FIG. 5O shows a flexible catheter 733 having a working lumen
734 that extends though the catheter 732 and terminates in a distal
end opening. Optionally, a second lumen 736 may also extend though
the catheter 732 and terminate in a distal end opening, as shown.
An endoscope 738 may be permanently positioned within this lumen
736 or such endoscope 738 may be temporarily inserted into (or
through) the lumen 736 to enable the operator to view the area
distal to the catheter 732. Additionally or alternatively, a side
scope or lumen 740 may be located on the catheter 732 and an
endoscope may be permanently embodied by or positioned in or
temporarily inserted into (or through) such side scope or lumen 740
to enable the operator to view the area distal to the catheter 732
and, in at least some cases, the distal end of the catheter 732
itself. In any devices which incorporate such optional side scope
or lumen 740, the side scope or lumen 740 may be of any suitable
length and may terminate distally at any suitable location and such
side scope or lumen 740 is not limited to the specific positioning
and the specific distal end location shown in the drawings. Also,
in embodiments that incorporate a side scope or lumen 740 such side
lumen may be employed as a guidewire or working lumen to permit the
catheter to be advanced over a guidewire or for other working
devices to be inserted therethrough.
[0200] FIG. 5P shows a balloon catheter and pressure expandable
stent system 744 which includes all of the elements of the balloon
expandable stent system shown in FIGS. 5G' 5G''' and, in addition,
may incorporate an endoscope or side lumen. Specifically, referring
to FIG. 5P, there is shown a balloon catheter and pressure
expandable stent system 744 that comprises a flexible catheter 746
having a balloon 750 and pressure expandable stent 748 thereon. A
side lumen 756 may be located on the catheter 746 and an endoscope
may be permanently positioned in or temporarily inserted into (or
through) such side lumen 756 to enable the operator to view the
balloon 750 and stent 748 and to advance the catheter 749 to its
desired position. Also, in embodiments that incorporate a side
lumen 756 such side lumen may be employed as a guidewire lumen to
permit the catheter 746 to be advanced over a guidewire.
Optionally, a lumen may extend through the catheter 746 and through
an opening 752 in the distal end of the catheter 749 and a
straight, curved, bendable, deflectable or steerable scope and/or
stent 754 may be passed through or received in that lumen to
facilitate over the wire and/or scope assisted and/or guided and/or
manipulated advancement of the catheter 749 to an intended
location. In routine use, the balloon 750 is initially deflated and
the stent 748 is radially compressed to a collapsed configuration,
around the deflated balloon 750. The catheter 746 with the balloon
750 deflated and the collapsed stent 748 mounted thereon is
advanced, under endoscopic guidance or over a guidewire, to a
position within a passageway such as a nostril, nasal cavity,
meatus, ostium, interior of a sinus, etc. that is to be stented.
Thereafter, the balloon 750 is inflated causing the stent 748 to
expand to a size that frictionally engages the surrounding tissue
so as to hold the stent 748 in place. In some instances the
procedure will be performed for the purpose of enlarging a
passageway (e.g., an ostium, meatus, etc.) and the stent 748 will
be expanded to a diameter that is sufficiently large to cause the
desired enlargement of the passageway and the stent 748 will then
perform a scaffolding function, maintaining the passageway in such
enlarged condition. After the stent 748 has been fully expanded and
implanted, the balloon 750 may be deflated and the catheter 748
removed. In some applications, the stent 748 may contain a
diagnostic or therapeutic substance as defined herein and such
substance may elute from the stent 748 into the surrounding tissue
to bring about a desired diagnostic or therapeutic effect. In some
cases, the stent 748 may be permanently implanted. In other cases
the stent 748 may be temporarily implanted. In cases where the
stent 748 is temporarily implanted, it may be removed in a second
procedure conducted to retrieve the stent 748 or the stent 748 may
be made of bioabsorbable or biodegradable material such that it
degrades or is absorbed within a desired period of time after
implantation. As shown in the examples of FIGS. 5R' and 5R'', in
some cases, such as when a stent is to be placed within the ostium
of a paranasal sinus, the stent and/or the balloon may be
specifically shaped to facilitate and/or cause the stent to seat in
a desired position and to prevent unwanted slippage of the stent.
For example, FIG. 5R' shows a device 1040 comprising a catheter
1042 having a balloon 1044 and stent 1046 mounted thereon as
described above. However, in this embodiment, the balloon 1044 and
stent 1046 are of a configuration where one end of the balloon 1044
and stent 1046 is larger in diameter than the other end. As
described above in connection with other embodiments such as those
shown in FIGS. 5P and 5Q, a side scope or side lumen 1048 may
optionally be formed on the catheter 1042 and/or a scope or
guidewire 1050 may optionally be passed through a lumen of the
catheter 1042 and out of its distal end. FIG. 5R'' shows another
device 1052 comprising a catheter 1054 having a balloon 1056 and
stent 1058 mounted thereon as described above. However, in this
embodiment, the balloon 1056 and stent 1058 are of a configuration
where both ends of the balloon 1056 and stent 1058 are larger in
diameter than the middle of the balloon 1056 and stent 1058. As a
result, the stent 1058 has an annular groove or indentation formed
circumferentially or about the mid-portion thereof or may be
hourglass or venture shaped, to facilitate seating of the stent
1058 within an ostium or orifice without longitudinal slippage of
the stent 1058. Again, as described above in connection with other
embodiments such as those shown in FIGS. 5P and 5Q, a side scope or
side lumen 1060 may optionally be formed on the catheter 1052
and/or a scope or guidewire 1062 may optionally be passed through a
lumen of the catheter 1054 and out of its distal end. In cases
where the procedure is intended to actually break bone (e.g., where
the stent 1046, 1058 is intended to dilate or enlarge a sinus
ostium) the specially shaped balloon 1044, 1056 may be made of
strong polymeric material as described hereabove to enable it to
exert bone-breaking pressure on the adjacent or surrounding bone as
it is inflated.
[0201] FIGS. 5Q and 5Q' show a self expanding stent and delivery
system 760 comprising a flexible outer sheath 762, a flexible inner
tube 764 and a stent 768. This stent differs from the stent 748 of
FIG. 5P only in that it is resilient and self-expanding rather than
pressure expandable. The stent 768 is biased to an expanded
configuration. Initially, it is compressed to a radially collapsed
configuration on the outer surface of the inner tube 764 and the
outer sheath 762 is advanced over the stent 768 to constrain the
stent 768 in its collapsed configuration, as can be seen in the
cross-sectional showing of FIG. 5Q'. A scope and/or guidewire 770
may be inserted through the lumen of the inner tube 764.
Additionally or alternatively, a side lumen 772 may be located on
the outer sheath 762 and an endoscope may be permanently positioned
in or temporarily inserted into (or through) such side lumen 772 to
enable the operator to view the distal portion of the system 760
and the area ahead of the distal end of the sheath 762 as the
system is advanced. Also, in embodiments that incorporate a side
lumen 772 such side lumen 772 may be employed as a guidewire lumen
to permit the system 760 to be advanced over a guidewire. In
routine operation the system 760, with its sheath 762 in a distally
advanced position such that it surrounds and constrains the
collapsed stent 768, is advanced, under endoscopic guidance and/or
over a guidewire, to a position within a passageway such as a
nostril, nasal cavity, meatus, ostium, interior of a sinus, etc.
that is to be stented. Thereafter, when the stent 768 is positioned
at the location to be stented, the sheath 762 is withdrawn,
allowing the self-expanding stent 768 to spring or self expand to a
radially expanded configuration in which it frictionally engages
the surrounding anatomical structure. Thereafter, the remainder of
the system 760 is removed, leaving the stent 768 implanted in the
body. The stent 768 may perform dilation and scaffolding and/or
substance delivery function(s) as described hereabove with respect
to the pressure expandable stent 748 of FIG. 5P.
[0202] FIG. 5S shows a snare apparatus 780 comprising a flexible
catheter 782 having a lumen 784 extending therethrough. A snare 786
having a general loop shape is advanceable out of the lumen 784 of
the device 780. In some embodiments, the snare 786 may optionally
be charged with electrical current or otherwise heated so that it
performs a cauterization function as it cuts through tissue.
Additionally or alternatively, in some embodiments, the snare 786
may be of variable diameter (e.g., a noose that may be tightened or
loosened by the operator). Also, optionally, a scope or side lumen
788 may be located on the catheter 782 and a stationary or moveable
endoscope may be permanently embodied in or temporarily inserted
into (or through) such side lumen 788 to enable the operator to
view the distal portion of the device 780 and the area of the snare
786. Also, in embodiments where the scope or side lumen 780
comprises a side lumen, such side lumen 788 may be employed as a
guidewire lumen to permit the device 780 to be advanced over a
guidewire. Alternatively, multiple lumens may run through catheter
782 such that they can accommodate a snare, a guidewire and/or an
endoscope. In routine operation, the snare 786 is initially
retracted within lumen 784 and the device 780 is advanced under
endoscopic guidance and/or over a guidewire, to a position within a
passageway such as a nostril, nasal cavity, meatus, ostium,
interior of a sinus, etc. where a polyp or other matter to be
snared or cut away is located. The snare 786 is advanced out of
lumen 784 and positioned around the polyp or other matter and,
thereafter, the snare may be pulled or moved, heated (if equipped
for heating) and/or tightened (if equipped for tightening) so as to
sever or cut the polyp or other matter. In some cases, the severed
polyp or other matter bay be suctioned through the lumen 784. In
other cases, a separate catheter or device may be introduced to
retrieve the severed polyp or other matter. After completion of the
procedure, the snare 786 may be retracted into lumen 784 and the
device 780 may be removed. Also, in some embodiments, the snare 786
may be replaced by a basket, bag or other retrieval receptacle that
is useable to capture and retrieve tissue or other matter and to
withdraw it into the lumen of the catheter 782.
[0203] FIG. 5T shows a forceps device 790 which comprises a
flexible shaft 792 having jaws or forceps 794 thereon. The jaws or
forceps 794 may be volitionally opened and closed by the operator.
A scope or side lumen 796 may be located on the flexible shaft 792,
as shown. In embodiments where the scope or side lumen 792
comprises a scope, such scope may be fixed or moveable and may be
used to observe or view the advancement of the device 790 and/or
the use of the forceps 794. In embodiments where the scope or side
lumen 796 comprises a side lumen, a stationary or moveable
endoscope may be permanently embodied in or temporarily inserted
into (or through) such side lumen 796 to enable the operator to
view the distal portion of the device 790 and the area of the
forceps 794. Also, in embodiments where the scope or side lumen 796
comprises a side lumen, such side lumen 796 may be employed as a
guidewire lumen to permit the device 790 to be advanced over a
guidewire. In routine operation, the device 790 is advanced, either
alone or through the lumen of a catheter, and possibly under
endoscopic guidance and/or over a guidewire, to a position within a
passageway such as a nostril, nasal cavity, meatus, ostium,
interior of a sinus, etc. where matter is to be grasped by the
forceps. Thereafter, under optional endoscopic guidance and
observation, the forceps 794 are used to grasp the intended matter.
In some embodiments, a distal portion of the flexible shaft 792 may
be bendable or steerable as indicated by doted lines on the example
of FIG. 5T. In some embodiments, the jaws of the forceps 794 may be
designed to sever and retain a specimen of tissue for biopsy or
other tissue sampling applications or the forceps 794 may comprise
scissors for cutting tissue, cartilage, bone, etc. Alternatively, a
lumen may pass through flexible shaft 792 and exit through or next
to the forceps 794 and allow the passage of a guidewire or
endoscope through such lumen.
[0204] FIGS. 5U and 5U' show a telescoping system 800 comprising a
flexible catheter 802, a flexible scope 804 and a guidewire 806.
The flexible scope 804 comprises a plurality of light transmitting
pathways 808 (e.g., optical fibers) that transmit light in the
distal direction from a light source (not shown) and out of the
distal end of the scope 804 such that the light is cast onto the
object or anatomical structure to be viewed. Also, the scope
comprises an image transmitting pathway 810 (e.g., optical fiber
and lens) that carries reflected light from distal end of the scope
to an eyepiece or monitor on which the image may be viewed. The
scope also has a guidewire lumen 805 extending therethrough and
opening through its distal end. The scope 804 is advanceable
through the flexible catheter 802 and a guidewire 806 that is
advanceable through a guidewire lumen 805 of the scope, as shown.
In routine operation, the telescoping system 800 may be inserted
into the nose and the scope 804 may be utilized to view an
anatomical structure, such as the ostium of a paranasal sinus, and
facilitate advancement of the guidewire into that anatomical
structure. Thereafter, the scope may be advanced over the guidewire
and into the anatomical structure (e.g., though the ostium and into
the interior of the paranasal sinus). The scope may then be used to
examine the anatomical structure (e.g., to view the condition of
the mucosa lining the paranasal sinus and to look for signs of
infection, tumors, etc.) The catheter 802 may then be advanced over
the scope 804 and into the anatomical structure (e.g., the catheter
tip may be advanced through the ostium and into the paranasal
sinus). Thereafter, the scope 804 may be removed and a diagnostic
or therapeutic substance as defined hereabove may be infused
through the catheter 802 and/or another working device, including
but not limited to the working devices shown in FIGS. 5A-5T and
5V-5Y''''', may be advanced through the catheter 802 and into the
anatomical structure where it is used to perform a diagnostic or
therapeutic function,
[0205] FIG. 5V shows a side port suction/cutting device 820 which
comprises a flexible outer tube 822, a flexible inner tube 830 is
disposed coaxially and rotatably mounted within the outer tube 822.
One or more bearings 834 (e.g., a helical bearing or a series of
individual cylindrical bearings) may be disposed between the outer
tube 822 and inner tube 830, as shown. Alternatively, one or both
apposing tube surfaces may be made of, lined with, or be coated by
etc. a lubricious material such as silicone or PTFE to facilitate
movement. A rotating cutter 832 is positioned on the distal end of
the inner tube 830. A side opening 828 is formed in the outer tube
822 and the cutter 832 is positioned proximal to the side opening
828. Optionally, a tapered atraumatic distal tip 824 may be formed
on the distal end of the outer tube 822 and the side opening 828
may be configured to form a ramp or chute through which matter may
pass into the area immediately distal to the cutter 832. Also
optionally, an opening may be formed in the distal end of the
distal tip such that a guidewire or scope 826 may pass through the
lumen of the inner tube 830 and out of the opening in the distal
tip, as shown. In operation, the device 820 is advanced to a
position where the side opening 828 is near a polyp, tissue or
other obstructive matter to be removed. The inner tube 830 and
cutter 832 are rotated. Suction may be applied through the lumen of
the inner tube 830 and/or through the lumen of the outer tube 822
to draw the obstructive matter into the side opening 828 and into
contact with the rotating cutter 832. As the obstructive matter is
severed by the rotating cutter 832, the severed obstructive matter
or pieces thereof may be suctioned through the lumen of the inner
tube 830 and/or through the lumen of the outer tube 822. Of course,
as in any of the working devices described in this patent
application, a scope or side lumen of any size or length, into
which a scope may be inserted (not shown in FIG. 5U but shown in
various other figures such as FIGS. 5O, 5P, 5Q, 5R, 5S and 5T) may
be attached to the outer tube 822 at a position which allows a
scope to be used to view the side opening 828 and matter entering
the side opening 828. Alternatively, the catheter may incorporate a
deflectable tip or a curved distal end which may force the side
opening of the catheter against a lumen wall or into the direction
of a polyp or other tissue to be removed.
[0206] In some applications of the invention, it may be desirable
to break bone, such as the thin bone that forms the periphery of a
sinus ostium. FIGS. 5W-5X''''' show devices that may be used to
break bones at specific locations. For example, FIGS. 5W-5W'' show
a device 840 that comprises a flexible catheter 842 having a rigid
cylindrical member 847 located on the distal end thereof. An
advanceable and retractable member 846 extends through the catheter
842 and is connected to a distal tip member 844. The distal tip
member 844 has a cylindrical proximal end 849 that is sized to be
received within the cylindrical member 847. As shown in FIGS. 5W'
and 5W'', in routine operation, the advanceable and retractable
member 846 is advanced to separate the distal tip member 844 from
the rigid cylindrical member 847. The device 840 is advanced to a
position adjacent to a bony structure, such as a structure formed
by bone B covered with mucosal tissue M. The device is positioned
such that the bony structure is between the cylindrical proximal
end 849 of the distal tip member 844 and the cylindrical member
847. The advanceable and retractable member 846 is then retracted,
pulling the distal tip member 844 in the proximal direction and
capturing the bony structure between the cylindrical proximal end
849 of the distal tip member 844 and the cylindrical member 847,
thereby breaking the bone B. The shape or configuration of the
distal tip member 844 and/or cylindrical member 847 may be varied
depending on the shape and pattern of break desired to be made in
the bone B, In this regard, FIGS. 5X-5X'''' show alternative
constructions or configurations that may be used to produce
different shapes and patterns of bone breaks. FIG. 5X' shows an
assembly 850 comprising a distal tip member 852 that has three (3)
projections on its proximal side and a proximal member 854 that has
three (3) notches in its distal surface, such notches being
configured to receive the three projections of the distal tip
member 852 when the distal tip member 852 is retracted. FIG. 5W''
shows an assembly 860 comprising a distal tip member that forms a
pincher for breaking bone. FIG. 5X''' shows an assembly 870
comprising a collapsible distal tip member 872 and a cylindrical
proximal member 874. The distal tip member 872 may be initially
deployed in a collapsed configuration that allows it to be advanced
through an opening such as the ostium of a sinus. Then, it may be
expanded to a size that is too large in diameter to pass through
that opening, thereby causing it to strike the periphery of the
opening as it is retracted in the proximal direction. In this
manner, the assembly 5X''' may be used to break bone B all the way
around an ostium or aperture. FIG. 5X'''' shows another assembly
880 comprising a distal tip 882 that has two projections on its
proximal side and a proximal member 884 that has one projection on
its distal side. The projection on the distal side of the proximal
member 884 is received between the projections formed on the
proximal side of the distal member 882 when the distal member 882
is retracted in the proximal direction.
[0207] FIGS. 5Y'-5Y''''', show various substance delivery implants
that may be implanted into the nasal cavities, paranasal sinuses,
middle or inner ear, nasopharynx, etc. to deliver a diagnostic or
therapeutic substance as defined herein. These devices may be
formed of permanent or bio-absorbable material. In many instances,
these devices will be formed of a polymer (e.g., Hydron, hydrogel,
collagen, etc.) within which the diagnostic or therapeutic
substance is contained or a polymer or metal that is coated with or
otherwise contains the substance. FIG. 5Y' shows an implant 1070
that comprises a bead or pellet. FIG. 5Y'' shows an implant 1072
that comprises a wafer. FIG. 5Y''' shows an implant 1074 that
comprises a brad or staple. FIG. 5Y'''' shows an implant 1076 that
comprises a screw or helical coil. FIG. 5Y''''' shows an implant
1078 that comprises a strand or coil, another example of which is
shown in FIG. 7E and described herebelow.
[0208] D. Pre-Shaped Guide Catheters
[0209] FIGS. 6A-6E show various guide catheters that may be used in
the methods of the present invention.
[0210] FIG. 6A shows a sphenoid sinus guide catheter 120 that
incorporates three preformed curves 122, 124, 126. The three
dimensional shape of the catheter 120 is such that, when advanced
through a nasal cavity, the distal end of the catheter 120 will
tend to enter the ostium of the sphenoid sinus.
[0211] FIG. 6B shows a frontal sinus guide catheter 128 that
incorporates two preformed curves 130, 133. The shape of the
catheter 128 is such that, when advanced through a nasal cavity,
the distal end of the catheter 128 will tend to enter the ostium of
the frontal sinus.
[0212] FIG. 6C shows a maxillary sinus guide catheter 136 that
incorporates three preformed curves 138, 140, 142. The three
dimensional shape of the catheter 136 is such that, when advanced
through a nasal cavity, the distal end of the catheter 136 will
tend to enter the ostium of the maxillary sinus.
[0213] FIG. 6D shows an ethmoid sinus guide catheter 144 that
incorporates two preformed curves 146,148. The three dimensional
shape of the catheter 144 is such that, when advanced through a
nasal cavity, the distal end of the catheter 144 will tend to enter
the ostium of the ethmoid sinus.
[0214] In some of the methods of the invention, it will be
desirable to plug the ostium of a sinus or another opening such as
the nasolacrimal duct or the nasopharyngeal opening into the
Eustachian tube. Thus, any of the above-described guide catheters
120, 128, 136, 144 may be equipped with a plug on its distal tip
such that when its distal end enters the sinus ostium it will plug
the sinus thereby preventing fluid from exiting the sinus through
the ostium. An example of one such procedure is shown in FIG. 7B
and described herebelow.
[0215] FIG. 6E shows a plug guide catheter 149 that is useable for
temporarily plugging the opening into a nasolacrimal duct. This
plug guide catheter 149 has two preformed curves 150, 152 and a
plug 154 at its distal tip. The three dimensional configuration of
this catheter 149 is such that, when advanced through a nasal
cavity the distal tip plug 154 will tend to enter the opening into
the nasolacrimal duct. The plug may consist of, but is not limited
to, a semi-rigid plug or a balloon on the end of the catheter. It
will be appreciated that a different shaped plug guide catheter
(not shown) may be used to plug the Eustachian tube.
[0216] E. Devices and Methods for Treatment Within Paranasal
Sinuses:
[0217] FIGS. 7A-7G provide examples of devices and methods for
performing diagnostic or therapeutic procedures within the
paranasal sinuses. In the methods of the prior art, rigid or
flexible scopes are sometimes used to visualize the ostia of
sinuses but, typically, such scopes have not actually been advanced
into the interior of the sinuses. As described hereabove, the
present invention does provide devices and methods for placing
endoscopes inside the paranasal sinuses and such methods may or may
not be used in conjunction with any of the diagnostic or
therapeutic devices and methods shown in FIGS. 7A-7G.
[0218] FIG. 7A shows an electrode network delivery device 168 being
used to deliver radiofrequency or electrical current to the lining
of the sphenoid sinus SS. This device 168 comprises a flexible
catheter 168 that has been inserted through the sphenoidal sinus
ostium SSO. An expandable electrode network such as a cage 170 is
advanced out of the distal end of the catheter 169. Electrodes 172
are positioned at spaced apart locations on the cage. As the cage
170 expands, it places the electrodes in contact with the lining of
the sinus SS. Current is delivered to the electrodes 172 to ablate
all mucous producing tissue within the sinus in preparation for the
sinus to be functionally isolated or embolized, or to ablate tumors
or polyps located within the sinus.
[0219] FIG. 7B shows a procedure where a flowable substance, such
as a diagnostic or therapeutic substance as defined above, is
introduced into the sphenoid sinus SS and the ostium SSO has been
plugged by a sphenoid sinus plug guide catheter device 174. This
device 174 comprises a flexible catheter 176 having the shape shown
in FIG. 6A and described above and a plug member 178 at its distal
tip. The fluid is maintained in the sphenoid sinus SS until the
plug catheter device 174 is removed, allowing the fluid to then
drain through the sphenoid sinus ostium SSO. This procedure may be
particularly useful when it is desired to fill a sinus with
radiographic contrast agent to visualize the entire sinus or to
apply a therapeutic agent to the entire lining of the sinus by
entirely filling the sinus with the agent and maintaining such
fully filled state for a desired period of time to allow the agent
to act on the entire lining of the sinus. Imaging materials may be
mixed with visous agents so that they simulate mucous or if simple
structural imaging is desired it may be preferable to have
substances of lower viscosity. It may be also desirable to use
imaging agents which bind with the surface of the mucosa to
minimize the amount of injected contrast.
[0220] FIG. 7C shows a balloon catheter device 180 which comprises
a flexible catheter 182 having a balloon 184 that is positioned in
the sphenoid sinus ostium SSO and inflated to hold the catheter 182
in position while a quantity of a diagnostic or therapeutic
substance 186 (as defined above) is introduced into the interior of
the sinus SS. This therapeutic substance may be one or more of any
of the drug delivery materials and drugs selected from the previous
list, or may additionally include a sclerotic agent such as alcohol
to uniformly kill all the tissues within the cavity. Other
materials such as capasian or other neuro-toxic substances may be
considered to eliminate the pain and other sensation within the
cavity.
[0221] FIG. 7D shows a sensor equipped catheter device 190 that
comprises a flexible catheter 192 having a sensor 194 thereon for 3
dimensional mapping or navigation. This procedure may be used to
map the precise configuration of the interior of the sphenoid sinus
SS. Examples of the construction and use of such sensor 194 and
associated systems/computers are found in U.S. Pat. Nos. 5,647,361;
5,820,568; 5,730,128; 5,722,401; 5,578,007; 5,558,073; 5,465,717;
5,568,809; 5,694,945; 5,713,946; 5,729,129; 5,752,513; 5,833,608;
5,935,061; 5,931,818; 6,171,303; 5,931,818; 5,343,865; 5,425,370;
5,669,388; 6,015,414; 6,148,823 and 6,176,829, the entireties of
which are expressly incorporated herein by reference.
[0222] FIG. 7E shows an implant delivery device 196 which comprises
a flexible catheter 198 that is inserted through the sphenoid sinus
ostium SSO and into the sphenoid sinus SS and is being used to
implant a coil 200 within the sphenoid sinus. Such coil 200 may
comprise an elongate fiber or other elongate member that may
contain a diagnostic or therapeutic substance as defined herein.
This coil 200 may be constructed to embolize the sinus for the
purpose of to permanently close off the sinus and to prevent any
further mucous production, trapping of secretions or infection
and/or to deliver a diagnostic or therapeutic substance to the
tissues lining the sinus. For example, a coil for sustained
delivery of an antimicrobial agent may be implanted in a sinus to
treat an acute or chronic infection of that sinus. In some cases,
the coil may be bioabsorbable.
[0223] FIG. 7F shows an over-the-wire endoscopic system 240 being
used to view the interior of the sphenoid sinus SS. A flexible
catheter 242 is positioned in or near the sphenoid sinus ostium SSO
and a guidewire 248 is advanced through the sphenoid sinus ostium
SSO and into the sphenoid sinus SS. An over-the-wire endoscope 246
(such as a 2.2 mm over-the-wire scope available commercially as
Model #AF-28C from Olympus America, Melville, N.Y.) is advanced
over the guidewire 248 and is used to examine the interior of the
sphenoid sinus SS.
[0224] FIG. 7G shows a biopsy system 250 being used to obtain a
biopsy specimen from a lesion L within the sphenoid sinus SS. A
flexible catheter 242 is positioned in or near the sphenoid sinus
ostium SSO and an endoscope 246 is advanced through the catheter
242 and into the interior of the sinus SS. A biopsy instrument 252
is inserted through a working channel of the endoscope 246 and is
used, under endoscopic visualization and guidance, to obtain a
specimen of the lesion L.
[0225] F. General Examples of Interventions Using the Occluder
& Access Devices and/or Working Devices
[0226] FIGS. 8A-8D show two of many possible examples of methods
wherein the occluder & access devices 10, 12 of FIGS. 2A and 2B
and/or various working devices such as those shown in FIGS.
5A-5Y'''' are used to perform diagnostic and/or therapeutic
procedures within the nose, nasopharynx or paranasal sinuses.
[0227] In general, diagnostic interventions in accordance with this
invention may include: a) anatomic studies where obstructions,
sizes, parameters or abnormalities in anatomy are visualized and/or
identified, b) dynamic studies where gas, mucous or fluid is
introduced into the nose, sinus, nasal cavity, nasopharynx,
Eustachian tube, inner or middle ear, etc and the movement of such
materials is monitored to assess drainage or gas flow issues and c)
perturbation studies where an agent (e.g., an allergen, irritant,
agent that induces mucous production, etc.) is introduced into the
nose, sinus, nasal cavity, nasopharynx, Eustachian tube, inner or
middle ear, etc., and the patient's response and/or flow of the
endogenously produced mucous or other secretions is assessed.
Examples of procedures that may be used to perform these types of
diagnostic interventions include, but are not limited to, the
following:
[0228] 1. Gaining Access To Sinus: Access to one of more of the
paranasal sinuses is gained by advancement of catheter(s) into the
sinus or sinuses of interest. A guidewire may be inserted into the
sinus first and the catheter may then be advanced over the
guidewire and into the sinus. In some cases, a sinus ostium guide
catheter of the type shown in FIGS. 6A-6E may be inserted into the
ostium of the sinus and a smaller catheter may be advanced through
the guide catheter. One or more scopes may be used to visualize the
sinus ostium and to guide the guidewire and/or catheter into the
sinus ostium. In some cases, a steerable guidewire, catheter and/or
scope may be used to gain entry into the sinus. In some cases,
occlusion & access device(s) such as those shown in FIGS.
2A-2R, may be inserted and the guidewire(s), catheter(s) and/or
scope(s) used to access the sinus may be inserted through a device
insertion port on the occluder & access device.
[0229] 2. Mucous Flow Study: Optionally, after catheter access to
the sinus has been gained, an imageable contrast substance or
radioactive material such as microbeads or a flowable contrast
medium (e.g., an iodinated contrast solution with or without a
thickening agent to adjust its viscosity to that of mucous) that
may have a consistency similar to that of mucous may be injected
into the sinus. An imaging or scanning technique (e.g., X-ray,
fluoroscopy, CT scan, ultrasound, MRI, radiation detector, gamma
camera, etc.) may then be used to observe the flow of the contrast
medium through and out of the sinus. In some cases a fluoroscope
with a C-arm may be used in a fashion similar to that used in
coronary artery catheterization and angiography procedures to allow
the clinician to view the movement of the contrast medium from
different vantage points or angles. To facilitate flow of the
contrast medium from the sinus, the previously inserted catheter(s)
and/or guidewires and/or scope(s) may be backed out of the sinus
and ostium or removed completely, to allow normal flow to occur.
The patient's head and/or other body parts may be repositioned to
observe different postural drainage effects. In this manner, the
clinician may specifically locate and identify which anatomical
structures are obstructing or interfering with normal mucous flow
from the sinus.
[0230] 3. Air Flow Study: Optionally, after access to the sinus has
been gained as described in No. 1 above, an imageable or traceable
gas, such as a radiolabeled gas, radiopaque gas or a gas with
imageable or radioactive microbeads therein, may be injected
through a catheter and into the sinus. An imaging device or tracing
device (e.g., radiation detector, gamma camera, X-ray, fluoroscopy,
CT scan, ultrasound, MRI) may then be used to observe subsequent
movement or dissipation of the gas as it passes out of the sinus
and/or equilibrates with other sinus cavities. In this manner, the
clinician may determine whether normal gas exchange in the sinus is
occurring and may locate and identify any anatomical structures or
irregularities that are obstructing or interfering with normal gas
flow and/or gas exchange.
[0231] 4. Anatomic Dimension Study: An entire paranasal sinus or
other anatomical passageway or structure may be filled with an
imageable substance or otherwise measured to determine its actual
dimensions and/or configuration. In some such studies, access to a
paranasal sinus will be gained as described in No. 1 above and the
sinus may be filled with an imageable substance (e.g., contrast
medium). A suitable imaging technique (e.g., X-ray, fluoroscopy, CT
scan, ultrasound, MRI, radiation detector, gamma camera, etc.) may
then be used to determine the size and shape of the sinus. Again,
in such procedure, a moveable imaging apparatus such as a
fluoroscope with a C-arm may be used to view and measure the
contrast filled sinus from different vantage points or angles. One
example of such a procedure is shown in FIG. 7B and described
hereabove.
[0232] 5. Endoscopic Study: A flexible and/or steerable endoscope,
as described above, may be inserted into the nose, sinus, nasal
cavity, nasopharynx, Eustachian tube, inner or middle ear, etc and
used to visually examine the anatomy and/or to observe a treatment
and/or to assess the efficacy or completeness of a previously
rendered treatment. In cases where it is desired to view the
interior of a paranasal sinus, access to the sinus may be gained as
described in No. 1 above and the endoscope may be advanced into the
interior of the sinus either directly or over a guidewire.
[0233] 6. Transillumination Study: A flexible light emitting
instrument (e.g., a catheter having a powerful light emitting
apparatus at its distal end) may be advanced into the nose,
paranasal sinus, nasal cavity, nasopharynx, Eustachian tube, inner
or middle ear, etc and used to illuminate anatomical structures,
Direct or endoscopic observation may then be made from outside the
body and/or from other locations within the nose, sinus, nasal
cavity, nasopharynx, Eustachian tube, inner or middle ear, orbit,
cranial vault, etc. to observe anatomical structures and/or to
detect aberrant openings or leaks through which the light passes.
In cases where the light emitter and/or the viewing instrument
(e.g., endoscope) is/are positioned within paranasal sinus(es)
access to the sinus(es) may be gained as described in No. 1 above
and the light emitter and/or viewing instrument may then be
advanced into the sinus(es) either directly or over
guidewire(s).
[0234] 7. Other Imaging Studies: Other imaging techniques such as
MRI, CT, etc. in combination with any of the modalities set forth
in Nos. 1-6 above and modifications may be made to any of those
techniques to adjust for sinus anatomy or other pathology.
[0235] After any or all of the elected diagnostic studies have been
completed, one or more working devices, such as the flexible
devices described herein and shown in FIGS. 5A-5Y''''', may be
inserted and used to perform therapeutic procedure(s).
[0236] As shown in the example of FIG. 8A, an anterior/posterior
occluder & access device 10 is inserted through the right nasal
cavity NC. The device's anterior occluder 14 is positioned to
occlude the nostril on the right side while its posterior occluder
(not seen in FIGS. 8A-8E) occludes the posterior choanae or
nasopharynx. An anterior occluder & access device 12 is
inserted into the left nasal cavity and its occluder 40 occludes
the left nostril. In this manner, a sealed operative field is
established between the posterior occluder positioned in the
posterior choanae or nasopharynx and the anterior occluders 14, 40
positioned in the right and left nostrils or anterior nasal
cavities.
[0237] FIGS. 8B-8C show an example of a method for performing a
diagnostic and/or therapeutic procedure in the right frontal sinus
FS in the patient in whom the occluder & access devices 10, 14
have been inserted. In FIG. 8B, a frontal sinus guide catheter 128
is inserted into the working device insertion port 30 and advanced
through tube 16 and out of outlet aperture 22. The guide catheter
128 is then advanced to a position where its distal end is in the
right frontal sinus ostium.
[0238] In FIG. 8C, a working device 202 is inserted through the
guide catheter 128 and into the frontal sinus FS. This working
device 202 may comprise any of the devices shown in FIGS.
5A-5Y''''' or 7A-7G. In some procedures, it may be desired to
initially introduce a contrast agent into the frontal sinus FS and
pull back the guide catheter 128 to allow the contrast agent to
drain from the sinus. Imaging of the draining contrast agent may be
used to diagnose drainage impairment and to identify the specific
anatomical structures that are causing the impairment of drainage.
Thereafter, the guide catheter may be reinserted into the frontal
sinus ostium and the working device(s) 202 may be used to modify
the structures that have been identified and impairments to
drainage. Thereafter, the contrast injection and imaging steps may
be repeated to assess whether the procedure(s) performed have
overcome or corrected the drainage problem that had been initially
diagnosed. A suction device 206 is connected by way of suction line
204 to port 36 to suction blood, other fluid or debris from the
operative field during the procedure.
[0239] FIGS. 8D and 8E show an example of a treatment rendered to
the left maxillary sinus MS, in the same patient in whom the
occluder & access devices 10, 14 have been inserted. In FIG.
8D, a guide catheter 136 is inserted into device insertion aperture
44 and advanced through tube 41 to a position where the distal end
of the guide catheter 136 is positioned in the ostium of the
maxillary sinus MS.
[0240] Thereafter, as shown in FIG. 8E, a working device 202 is
inserted through the guide catheter 136 and into the maxillary
sinus MS. This working device 202 may comprise any of the devices
shown in FIGS. 5A-Y''''' or 7A-7G. In some procedures, it may be
desired to initially introduce a contrast agent into the maxillary
sinus MS by the same procedure described above in reference to
FIGS. 8B and 8C.
[0241] After all of the desired procedures have been completed, the
anterior occluders 14, 40 and posterior occluder (not shown on
FIGS. 8A-8E) are collapsed (e.g., deflated) and the occluder &
access devices as well as the guide catheters and working devices
are removed (except for implants such as stents, embolic coils,
substance delivery implants, etc.).
[0242] G. Cochlear Implant Procedure
[0243] FIGS. 9A-9C show a procedure for installation of a cochlear
implant in accordance with the present invention. In this
procedure, the nasopharyngeal opening into the Eustachian tube ET
is located and a guidewire is initially advanced into the
Eustachian tube ET. A catheter 900 is advanced over the guidewire
to a location where the distal end of the catheter 900 is in or
near the tympanic cavity TC of the middle ear. Thereafter, if
deemed necessary, a forceps device 790 and/or other devices are
advanced through the catheter 900 and used to remove the small
bones of the sear (i.e., the malleus, incus and stirrup) as shown
in FIG. 9A. This optional removal of the bones of the middle ear
may be done under endoscopic visualization using an endoscope
equipped device such as the endoscope equipped forceps device 790
shown in FIG. 5T and described above. As shown in FIG. 9B, a
cochlear guide catheter 904 having a "J" shaped distal tip 905 is
advanced through the catheter 900 to a position where the tip 905
of the cochlear guide catheter 904 is directed into or inserted
into the cochlea C. In some applications, the cochlear guide
catheter 904 may be configured to advance into the round window of
the cochlea and through the secondary tympanic membrane that covers
the round window. If necessary, a penetrator such as a needle,
drill or cutter may be advanced through or formed or positioned on
the distal end of the cochlear guide catheter 904 to penetrate
through the secondary tympanic membrane. In other applications, the
cochlear guide catheter 904 may be positioned adjacent to the
cochlea and a cochleostomy device (e.g., a penetrator such as a
drill, needle or cutter) may be advanced through or formed or
positioned on the distal end of the cochlear guide catheter 904 and
used to form a cochleostomy through which the distal end of the
guide catheter 904 is advanced into the cochlea C. Thereafter, a
cochlear electrode array 906 is advanced through the cochlear guide
catheter 904 and into the cochlea, as seen in FIG. 9B. One example
of a commercially available cochlear electrode array is the Nucleus
24 Countour device manufactured by Cochlear Corporation.
[0244] Thereafter, a sound receiving device or transducer 908 is
advanced through the catheter 900 and positioned in the tympanic
cavity TC. The sound receiving device or transducer 908 may be of
any type that is a) sufficiently small to pass through the
Eustachian tube ET and into the tympanic cavity TC and b) useable
to perform the desired function of converting sound waves to
electrical impulses and delivering such electrical impulses to the
cochlear electrode array 906. A microphone/power/electronics device
910 may be positioned in the outer ear canal, as shown in FIG. 9C
or may be implanted subcutaneously or in any other way that is
acceptable. Certain non-limiting examples of devices 906, 908, 910
that may be useable for this procedure are set forth in PCT
International Patent Publication No. WO 2004/018980 A2 designating
the United States, the entirety of which is expressly incorporated
herein by reference.
[0245] It is to be appreciated that the invention has been
described hereabove with reference to certain examples or
embodiments of the invention but that various additions, deletions,
alterations and modifications may be made to those examples and
embodiments without departing from the intended spirit and scope of
the invention. For example, any element or attribute of one
embodiment or example may be incorporated into or used with another
embodiment or example, unless to do so would render the embodiment
or example unsuitable for its intended use. All reasonable
additions, deletions, modifications and alterations are to be
considered equivalents of the described examples and embodiments
and are to be included within the scope of the following
claims.
* * * * *