U.S. patent number 3,915,173 [Application Number 05/486,656] was granted by the patent office on 1975-10-28 for intubation device for the inhalation of gasses.
This patent grant is currently assigned to AnSur, Inc.. Invention is credited to John H. Brekke.
United States Patent |
3,915,173 |
Brekke |
October 28, 1975 |
Intubation device for the inhalation of gasses
Abstract
An intubation device for inhalation of gases including a cannula
connected to an endotracheal tube having a first inflatable member
mounted thereon for sealing contact with the base of the tongue,
the soft palate and lateral pharyngeal walls together with a fluid
supply tube for inflating the first inflatable member. A second
inflatable member mounted on the tube for sealing contact with the
trachea with a fluid supply tube for inflating the second
inflatable member and a device for connecting one of the leads of
the cannula to the outer end of the tube. An oro-pharyngeal tube
having a single inflatable barrier for sealing contact with the
base of the tongue, soft palate and lateral pharyngeal walls
together with a fluid supply tube for inflating the inflatable
barrier and a device for connecting one of the cannula leads to the
other end of the tube.
Inventors: |
Brekke; John H. (Duluth,
MN) |
Assignee: |
AnSur, Inc. (Virginia,
MN)
|
Family
ID: |
23932753 |
Appl.
No.: |
05/486,656 |
Filed: |
July 8, 1974 |
Current U.S.
Class: |
128/207.18;
128/207.15; 604/907; 604/915 |
Current CPC
Class: |
A61M
16/04 (20130101); A61B 17/12136 (20130101); A61M
16/0666 (20130101); A61M 16/0486 (20140204); A61M
25/02 (20130101); A61M 16/0459 (20140204); A61B
17/12104 (20130101); A61B 17/12022 (20130101); A61B
17/12181 (20130101); A61M 25/10 (20130101); A61M
2025/0226 (20130101); A61M 16/0461 (20130101); A61M
16/208 (20130101) |
Current International
Class: |
A61B
17/12 (20060101); A61M 16/06 (20060101); A61M
25/02 (20060101); A61M 16/04 (20060101); A61M
25/10 (20060101); A61M 16/20 (20060101); A61M
025/00 () |
Field of
Search: |
;128/14N,184,188,198-200,203,206-207,250,325,342-344,348-351 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
27,450 |
|
Mar 1904 |
|
GB |
|
863,412 |
|
Jun 1941 |
|
FR |
|
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Opitz; Rick
Attorney, Agent or Firm: Wicks & Nemer
Claims
I claim:
1. An intubation device for inhalation of gases comprising in
combination:
a. a cannula including a central tubular portion having at the
lower end
b. first and second tubular leads extending from the lower end
thereof,
c. means for sealing at least one of the outer end portions of the
leads within the nose,
d. a one-way exhaust valve carried by said central tubular
portion,
e. means for supplying gases to said central tubular portion,
f. an endotracheal tube connected to one of said leads for
insertion into the nose and down into the trachea,
g. said tube having a first inflatable member mounted thereon for
sealing contact with the base of the tongue, the soft palate and
lateral pharyngeal walls when infalted,
h. means for inflating said first inflatable member,
i. a second inflatable member mounted on said tube at the lower end
thereof for sealing contact with the trachea inferior to the vocal
chords,
j. means for inflating said second inflatable member, and
k. means connecting one of said leads of said cannula to the outer
end of said tube.
2. The device of claim 1 in which said means for sealing of the
outer end portion of the cannula leads within the nose is a
compressible bulb carried by each of the leads.
3. The device of claim 2 in which said means for supplying
anesthetic or the like to said central tubular portion includes
first and second supply tubes connected to a source of gas.
4. The device of claim 3 in which
a. said means for inflating said first inflatable member includes a
first conduit formed in the wall of said tube and communicating
with the interior of said first inflatable member the outer end of
said first conduit terminating in
b. an air supply tube.
5. The device of claim 4 in which
a. said means for inflating said second inflatable member includes
a second conduit formed in the wall of said endotracheal tube and
communicating with the interior of said second inflatable
member.
6. An intubation device for inhalation of gases comprising in
combination:
a. a cannula including a central tubular portion having at the
lower end,
b. first and second tubular leads extending from the lower end
thereof,
c. means for sealing each of the outer end portions of the leads
within the nose,
d. a one-way exhaust valve carried by said central tubular
portion,
e. means for supplying gases to said central tubular portion,
f. an oro-pharyngeal tube connected to one of said tubular leads
for insertion into the nose and down into the oro-pharynx,
g. said tube having an inflatable member mounted thereon for
sealing contact with the base of the tongue, soft palate and
lateral pharyngeal walls when inflated,
h. means for inflating said inflatable member, and
i. means connecting one of said leads of said cannula to the outer
end of said tube.
7. The device of claim 6 in which said means for sealing the outer
end portions of the cannula leads within the nose is a compressible
bulb carried by each of the leads.
8. The device of claim 7 in which said means for supplying a gas to
said central tubular portion includes first and second supply tubes
connected to a source of gas.
9. The device of claim 8 in which
a. said means for inflating said inflatable member includes a
conduit formed in the wall of said tube and communicating with the
interior of the inflatable member, the outer end of said conduit
terminating in
b. an air supply tube.
Description
SUMMARY
The invention is in the field of the administration of anesthetics
and/or oxygen for surgical procedures with access to the oral
cavity, face and neck in two environments which are (I) the
operating room of a hospital and (II) an oral surgery office or an
out patient clinic in either case where the level of anesthesia is
relatively light compared to that of the operating room.
Currently used in environment (I) above is an endotracheal tube
with an inflatable cuff at the lower end which positions below the
vocal chords, the cuff forming a barrier between the oral cavity
and the tracheobronchial tree which prevents aspiration of blood,
bone, tooth fragments, wire, ete. As the tube exits from the nose a
hardware connection is required. This with the supply of anesthetic
located behind the head of the patient requiring the hardware to
pass up over the nose and head. This arrangement restricts access
to the premaxillary area (upper front jaw) and puts excessive
forces on the soft tissues of the nose which frequently produce
trauma. Such a tube with the aforementioned inflatable cuff
provides no barrier between the oral cavity and oro-pharynx and
unknown foreign matter and surgical debris in that area can pass
into the trachea when the cuff 20 is deflated. To rememdy such a
situation it is common to put a moist sponge around the tube in the
area of the oro-pharynx to prevent debris from gaining access to
areas of the oro-pharynx; however, debris can become trapped
without notice in the sponge or can bypass the sponge without
notice thereby gaining access to the oro-pharynx and trachea when
sponge and tube are removed.
Currently as to environment (II) above, the level of anesthesia is
much lighter and anesthetic is delivered only by a mask; no tube is
placed into the trachea. The nasal mask, which is totally outside
the respiratory tract, provides nothing to maintain a reliable and
patent airway or to maintain an effective barrier between the oral
cavity, oro-pharynx, and the trachea. Effective sealing of the mask
against the surface of the face is difficult to achieve and
impossible to maintain during longer procedure due to movement of
the patient. An effective seal between the patient and the
anesthetic delivery apparatus is important in order to prevent
escape of anesthetic gases and oxygen into the operatory
environment and to prevent the patient's inspiration of atmospheric
air (thus diluting the effect of the administered anesthetics or
oxygen). With a mask a "gauze curtain" is used to partition the
oral cavity from the oro-pharynx. This "gauze curtain" is adequate
for short duration surgery but it is inadequate for longer
procedures because it acts as a trap for debris, is moved by
actions of the patient, operator or assistants which causes
openings allowing aspiration of debris into the lungs. The "gauze
curtain" also becomes saturated with blood and saliva thereby
allowing fluids to pass through it into the upper respitory tract.
Also when the patient moves, the mask seal against the face is
broken. In addition, the mask severely limits surgical access to
the anterior portion of the maxilla.
It is generally an object of the invention to provide mechanisms
for the elimination of the above difficulties while providing
adequate and efficient inhalation of anesthetics and oxygen under
both environments (I) and (II) above.
It is an object of the invention to provide an anesthetic nasal
cannula which replaces the currently used nasal mask in environment
(II) above. It also replaces the hardware for attaching the gas
supply tube to the anesthetic machine in environment (I) above, all
of which does away with trauma to the hose and improves access to
the surgical fields of the face and oral cavity.
Further, the cannula is combined with the endotracheal tube for
operation in environment (I) above with the attendant benefits
herein set forth. The tubular portions of the cannula have soft
bendable wires that take a fix molded in the wall thereof whereby
the portions may be formed to accommodate contours of the face.
In addition, the nasal cannula provides a positive air seal with
the nose for more efficient administration of gases in environment
(II) above.
It is a further object of the invention to provide a nasopharyngeal
tube having an inflatable barrier which forms an effective barrier
between the oral cavity and the oro-pharynx with the tube connected
to the above mentioned cannula for use in environment (II) above.
The barrier contacts the base of the tongue, the soft palate and
the tonsils or if no tonsils, the mucosa of the tonsilar fossae
when inflated and does away with the conventional "gauze curtain"
and its deficiencies. The naso-pharyngeal tube is used with the
cannula as set forth herein.
It is a still further object of the invention to provide for use in
environment (I) above the cannula together with a naso-endotracheal
tube having the inflatable oro-pharyngeal barrier and an inflatable
cuff on the lower end of the tube which when inflated blocks the
trachea just below the vocal chords. This allows free access to all
surgical fields, gives a patentcy of airway and seal of airway
against leak, gives an effective partition between oral cavity and
oro-pharynx, and provides positive locking between the endotracheal
tube and the nasal-cannula which connects the endotracheal tube and
the nasal-cannula which connects the endotracheal tube to the
anesthetic machine. Presently all connections to the currently used
naso-endotracheal tube are "friction grip" only with no positive
locking capabilities.
For a light plane of anesthesia as used in environment (II), the
cannula by itself may be used instead of the conventional mask with
its attendant problems. The benefits are, when compared to the use
of a mask, free access to intra-oral surgical fields, the cannula
stays in place providing a seal much better than a nasal mask and
the compressible nose bulbs on the cannula provide an effective
seal for the device preventing leaking of anesthetic gases into the
operatory and the patients inhalation of room air.
In the drawings forming part of this application:
FIG. 1 is a side elevational view of a human head with the
intubation device embodying the invention in operative position
with portions of the head broken away and the oropharyngeal barrier
and the endotracheal tube cuff inflated.
FIG. 1a illustrates a portion of the nasalpharyngeal tube at the
area of the oro-pharyngeal inflatable barrier a portion of which is
in section.
FIG. 2 is a perspective view of the nose-engaging portion of the
nasal cannula in position on a nose partially shown.
FIG. 2a is an enlarged sectional view on the line 2a-- 2a of FIG.
2.
FIG. 3 is a bottom plan view of that shown in FIG. 2.
FIG. 4 is a front elevational view of the upper inflatable cuff in
inflated position shown in operative position in contact with the
soft palate and the base of the tongue with the mouth fully
open.
FIG. 5 is a longitudinal sectional view of a portion of the
nasal-pharyngeal tube showing the inflatable oro-pharyngeal barrier
deflated in full lines and shown inflated in broken lines.
FIG. 5a is a sectional view on the line 5a --5a of FIG. 1.
FIG. 6 is a sectional view on the line 6--6 of FIG. 5 with the
barrier in a collapsed condition.
FIG. 7 is a sectional view on the line 7--7 of FIG. 5.
FIG. 8 is a sectional view on the line 8--8 of FIG. 5.
FIG. 9 is a side elevational view of the nasal cannula of FIGS. 2
and 3 in position on a human head.
FIG. 10 is a sectional view of the connection of the intubation
tube with one of the cannula nose leads.
FIG. 11 is a sectional view on the line 11--11 of FIG. 2.
ENDOTRACHEAL TUBE
Referring to the drawings in detail, the intubation device A for
inhalation of anesthetics and oxygen for use in the operating room
of a hospital as environment (I) includes in one form the
endotracheal tube 16 which has formed intermediate the ends thereof
the oro-pharyngeal inflatable barrier 18 and adjacent the lower end
thereof is formed the inflatable endotracheal barrier 20 which
surrounds the tube 16. The tube 16 is of such a length that in use
the barrier 20 is positioned at a point below the vocal chords
illustrated as V and such a tube may be referred to as a
naso-endotracheal tube.
The barrier 18 is actually an expandable enclosed and enlarged
formation on the tube, and the wall of the tube 16 has the conduit
22 internally and longitudinally thereof and in communication with
the inside of the barrier 18. Connected to the conduit 22 is the
external ancillary tube 22a for injection of air into inflatable
barrier 18 by a hand syringe or other source of air whereby the
barrier may be inflated when in operative position. The barrier 18
is so positioned on the tube 16 so that it contacts the soft palate
P, the base of the tongue T and the mucosa of the tonsilar fossae
when inflated.
The wall of the tube 16 is formed with a second conduit 24
internally and longitudinally thereof which extends to the
inflatable cuff 20 and which leads to a second external ancillary
tube 24a for injection or air into inflatable cuff 20 by the means
above described whereby the cuff may be inflated in the manner
above and as indicated in FIGS. 1 and 4. The inflated cuff 20 in
operative position as in FIG. 1 seals the trachea Tr. The length of
the tube 16 is such that it accomodates a person with a relatively
large head and may be adjusted for proper position of the barriers
18 and 20 by moving the tube in or out of the nose.
CANNULA
With reference to the drawings, the numeral 26 designates an
anesthetic nasal cannula which includes the tubular central portion
28 which terminates in the first tubular lead 30 and the second
tubular lead 32 which branch off the central portion. The cannula
is used in both environments (I) and (II). Positioned on the end of
the lead 30 is the compressible collar 34 and positioned on the end
of the lead 32 is the compressible collar 36. The collars 34 and 36
are made of a sponge rubber material or the like and the same
engage with a frictional fit within the nostrils of the nose.
The upper end of the cannula central portion 28 terminates in a
one-way exhaust valve 38 and from the valve extends the first and
second supply tubes 40 and 42, respectively.
The valve 38 includes the cylindrical cap member 39 which has the
openings 39a formed in the wall thereof. At the juncture of the
supply tubes 40 and 42 and the central portion 28 is formed the
circular opening 40a in which is mounted the annular double slotted
ring 41. The outer slot of the ring 41 engages at the edges of the
opening 40a and positioned in the inner slot of the ring is the
O-ring 43b which has sealing engagement with the outer wall surface
of the cap member 39.
The cap 39 has formed on the lower end thereof the annular flange
43a and positioned between the flange 43a and the ring 41 is the
coil spring 45 which urges the cap into a closed position with the
top annular flange 45a of the cap into contact with ring 41. In
operation the valve opens when the patient exhales and closes when
the patient inhales. The supply tubes 40 and 42 lead to a
conventional pressurized source of anesthesia and oxygen not
shown.
The tubular portions 28, 30, 32, 40 and 42 of the cannula have soft
bendable wires 43 molded in the walls which take a fix whereby
portions of the tubular portions of the cannular may be formed to
accommodate contours of the face.
NASALPHARYNGEAL TUBE
Further provided is an intubation device B which includes the
nasalpharyngeal tube 44, particularly FIG. 1a which includes the
inflatable barrier 18a identical to barrier 18 and having an air
supply conduit 22b identical to supply conduit 22. The tube 44,
however, does not require nor have the conduit 24 of the tube 16.
The length of the tube 44 is such that the barrier 18a on the lower
inner end contacts the soft palate P and the base of the tongue T
when inflated as does the barrier 18. The length of the tube 44 is
such that it accomodates a person with a relatively large head and
may be adjusted by moving the tube in or out of the nose. The tube
44 has on its outer end a connection the same as with tube 16 with
a cannula lead 30 or 32 as shown in detail in FIG. 10. The lead not
used is plugged with any conventional plug. The nasalpharyngeal
tube is used in environment (II) above referred to such as out
patient clinic or oral surgery office and used with the cannula 26.
Connected to the conduit 22b is the external ancillary tube 22c for
injection of air into the inflatable barrier 18a by a hand syringe
or other source of air.
OPERATION
The cannula 26 is used by the general dentist, e.g., for inhalation
of nitrous oxide to produce relative analgesia (relief of pain
only) for general dental procedure with which the patient is
conscious and can cough up debris. The supply lines 40 and 42 are
hooked up to conventional anesthetic machine and the compressible
collars of the leads 30 and 32 are positioned within the nostrils
of the nose. This allows administration of an analgesia without the
trauma of a face mask and the difficulties encountered as
heretofore set forth.
The cannula 26 is also used by the oral surgeon when performing
short duration procedures under intraveneous anesthesia
(unconscious) which gives relief of pain where the patient is
unconscious or under conditions when oxygen is needed with the
patient not fully under the effect of the anesthesia.
Further, the inhalation therapist may use the cannular 26 to
administer oxygen to, e.g., coronary patients or any patient
requiring oxygen.
As to use of the cannula 26 by the oral surgeon, the patient is
anesthetized by intravenous anesthetics and upon the loss of
consciousness gas is turned on and the cannula applied as set forth
above. The tubular portions of the cannula are then formed to adapt
to the contours of the face.
As to use of the naso-pharyngeal tube B, the same is used by the
oral surgeon only and the steps for use are as follows: the patient
is given intraveneous anesthetics to produce unconsciousness of the
patient. The naso-pharyngeal tube B is then lubricated and a
syringe is attached to the supply tube 22c. The tube 44 is then
inserted through a nostril of the nose to substantially four-fifths
of its length. The gas is then turned on. Then one of the cannula
leads is engaged and locked onto the outer end of the tube 44. A
plug is then inserted into the end of the remaining cannula lead to
occlude it. Next the tube 44 is inserted fully as in FIG. 1. The
cannula tubular portions are then formed to adapt to the contours
of the face. The barrier 18a is then inflated by means of the
supply tube 22c to appropriate volume so that it forms a positive
seal on the soft palate, the base of the tongue and the tonsils or
if the tonsils are removed the mucosa of the tonsilar fossae.
As to use of the naso-endotracheal tube A with the cannula in
environment (I) the steps are as follows: first the patient is
placed on a table and anesthetized intraveneously. The patient is
paralyzed with a suitable skeletal muscle paralytic agent and then
is oxygenated using a face mask. The tube 16 is lubricated and
inserted through the nose into the oro-pharynx. The vocal chords
are then visualized by using a laryngoscope whereby the tube may be
properly aimed. The tube is then inserted between the vocal chords
with the barrier 20 just beyond the vocal chords and into the
trachea. The gas is then turned on. One lead of the cannula is
connected to the tube 16 and locked thereon with the other lead of
the cannula blocked by a plug. The tubular portions of the cannula
are adapted to the contours of the face as previously set foth. The
barrier 20 is then inflated by means of the supply tube 22 and the
barrier 18 is inflated by supply tube 22a. The surgeon may then go
to work.
The barrier 20 is a back up to the barrier 18 in the event foreign
material gets past barrier 18. The barrier 18 provides a seal far
more reliable than a conventional surgical "gauze curtain"
heretofore referred to. A conventional "gauze curtain" becomes
saturated with blood and loses its seal with the base of the tongue
and soft palate.
* * * * *