U.S. patent application number 11/257102 was filed with the patent office on 2006-02-16 for multi-function surgical instrument.
This patent application is currently assigned to Boston Scientific Scimed, Inc.. Invention is credited to Sheila Caira, Russell F. Durgin.
Application Number | 20060036234 11/257102 |
Document ID | / |
Family ID | 22653072 |
Filed Date | 2006-02-16 |
United States Patent
Application |
20060036234 |
Kind Code |
A1 |
Durgin; Russell F. ; et
al. |
February 16, 2006 |
Multi-function surgical instrument
Abstract
A multi-function surgical instrument is disclosed. In accordance
with an embodiment of the present invention, the surgical
instrument includes a catheter, a bipolar hemostat assembly, an
attachment member, and a surgical tool. The bipolar hemostat
assembly includes an electrical connector at a proximal end, a
bipolar electrode assembly at a distal end, and first and second
electrical leads extending from the proximal end to the distal end
and disposed within the catheter. The bipolar electrode assembly
includes an aperture that extends axially therethrough. The
attachment member is disposed within the catheter and has a
proximal end and a distal end where the distal end is movable
within the aperture of the bipolar electrode assembly between a
first position wherein the distal end is extended from the bipolar
electrode assembly and a second position wherein the distal end is
retracted within the bipolar electrode assembly. The surgical tool
is attached to the distal end of the attachment member.
Inventors: |
Durgin; Russell F.;
(Attleboro, MA) ; Caira; Sheila; (Auburndale,
MA) |
Correspondence
Address: |
Robert L. Grabarek, Jr.;KENYON & KENYON
Suite 700
1500 K Street, N.W.
Washington
DC
20005
US
|
Assignee: |
Boston Scientific Scimed,
Inc.
|
Family ID: |
22653072 |
Appl. No.: |
11/257102 |
Filed: |
October 25, 2005 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10457435 |
Jun 10, 2003 |
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11257102 |
Oct 25, 2005 |
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09784118 |
Feb 22, 2001 |
6610056 |
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10457435 |
Jun 10, 2003 |
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09178570 |
Oct 26, 1998 |
6221039 |
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09784118 |
Feb 22, 2001 |
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Current U.S.
Class: |
606/21 ;
606/50 |
Current CPC
Class: |
A61B 2018/141 20130101;
A61B 2218/002 20130101; A61B 90/37 20160201; A61B 2018/1425
20130101; A61B 2018/126 20130101; A61B 2018/00404 20130101; A61B
2018/00589 20130101; A61B 2018/1437 20130101; A61B 18/1492
20130101; A61B 2018/00011 20130101 |
Class at
Publication: |
606/021 ;
606/050 |
International
Class: |
A61B 18/02 20060101
A61B018/02; A61B 18/14 20060101 A61B018/14 |
Claims
1.-11. (canceled)
12. multi-function surgical instrument comprising: a catheter; a
hemostat assembly, said hemostat assembly including an electrical
connector at a proximal end, an electrode assembly at a distal end,
wherein said electrode assembly includes an aperture extending
axially therethrough, and a spiral electrode spirally disposed at
said distal end; an electrical lead extending from said proximal
end to said distal end and disposed within said catheter to
electrically connect said spiral electrode to said electrical
connector; an attachment member, said attachment member disposed
within said catheter and having a proximal end and a distal end,
said distal end movable within said aperture of said electrode
assembly between a first position wherein said distal end is
extended from said electrode assembly and a second position wherein
said distal end is retracted within said electrode assembly; and a
surgical tool, said surgical tool attached to said distal end of
said attachment member.
13. The multi-function surgical instrument of claim 12 wherein said
electrode assembly is a plated ceramic tip.
14. The multi-function surgical instrument of claim 12 wherein said
spiral electrode is electrically connected to said electrical lead
with a conductive epoxy material.
15. The multi-function surgical instrument of claim 12 wherein said
hemostat assembly is a bipolar hemostat assembly.
16. The multi-function surgical instrument of claim 15 wherein said
electrode assembly is a bipolar electrode assembly further
comprising a second spiral electrode spirally disposed at said
distal end.
17. The multi-function surgical instrument of claim 16 further
comprising a second electrical lead to electrically connect said
second spiral electrode to said electrical connector.
18. The multi-function surgical instrument of claim 12 further
comprising an irrigation assembly, said irrigation assembly
attached to a proximal end of said catheter.
19. The multi-function surgical instrument of claim 12 wherein said
surgical tool is welded to said attachment member.
20. A multi-function surgical instrument comprising: a catheter; a
hemostat assembly, said hemostat assembly including an electrical
connector at a proximal end, an electrode assembly at a distal end,
and an electrical lead extending from said proximal end to said
distal end and disposed within said catheter and wherein said
electrode assembly includes an aperture extending axially
therethrough; an attachment member, wherein said attachment member
is a rod and wherein said attachment member is disposed within said
catheter and having a proximal end and a distal end, said distal
end movable within said aperture of said electrode assembly between
a first position wherein said distal end is extended from said
electrode assembly and a second position wherein said distal end is
retracted within said electrode assembly; and a surgical tool, said
surgical tool attached to said distal end of said attachment
member.
21. The multi-function surgical instrument of claim 20 further
comprising an irrigation assembly, said irrigation assembly
attached to a proximal end of said catheter.
22. The multi-function surgical instrument of claim 20 further
comprising a balloon, said balloon disposed on an outside diameter
of said catheter at a distal end of said catheter.
23. The multi-finction surgical instrument of claim 20 wherein said
surgical tool is a snare.
24. The multi-function surgical instrument of claim 20 wherein said
surgical tool is a grasper/forceps device.
25. The multi-function surgical instrument of claim 20 wherein said
surgical tool is a scraper/forceps device.
26. The multi-function surgical instrument of claim 20 wherein said
surgical tool is a retrieval basket.
27. The multi-function surgical instrument of claim 20 wherein said
surgical tool is a cytology brush.
28. The multi-function surgical instrument of claim 20 wherein said
surgical tool is a cryotherapy tube.
29. The multi-function surgical instrument of claim 20 wherein said
surgical tool is welded to said attachment member.
30. A multi-function surgical instrument comprising: a catheter; a
hemostat assembly, said hemostat assembly including an electrical
connector at a proximal end, an electrode assembly at a distal end,
and an electrical lead extending from said proximal end to said
distal end and disposed within said catheter and wherein said
electrode assembly includes an aperture extending axially
therethrough; an attachment member, wherein said attachment member
is an injection needle and wherein said attachment member is
disposed within said catheter and having a proximal end and a
distal end, said distal end movable within said aperture of said
electrode assembly between a first position wherein said distal end
is extended from said electrode assembly and a second position
wherein said distal end is retracted within said electrode
assembly; and a surgical tool, said surgical tool attached to said
distal end of said attachment member.
31. The multi-function surgical instrument of claim 28 further
comprising an injection needle hub slidably disposed within said
catheter, wherein said injection needle is disposed within said hub
and said hub includes an anti-rotation device.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a multi-function surgical
instrument. More specifically, the invention is a surgical
instrument that combines a hemostat assembly with other surgical
tools to provide the capability to a surgeon to accomplish multiple
surgical procedures with a single instrument.
[0002] Currently, a surgical instrument is known that combines a
hemostatic capability with an irrigation capability and an
injection capability. The instrument provides multi-functionality
in a single surgical instrument, which results in efficiencies for
the surgeon who is performing a surgical procedure. With the known
multi-function surgical instrument, the surgeon is not required to
insert and remove multiple surgical instruments from the patient in
order to perform the procedure. However, there are procedures that
the surgeon may be required to perform that require capabilities in
addition to, or different from, those capabilities provided by the
multi-function instrument described above. For example, the surgeon
may be required to capture a polyp by utilizing a snare device. In
this circumstance where the physician is required to perform a
procedure that requires a capability that is not included in the
multi-function surgical instrument described above, the physician
would have to utilize a separate tool in order to obtain this
capability. This reduces the efficiency of the surgeon when
performing the entire procedure.
[0003] Therefore, it would be desirable to provide a multi-function
surgical instrument that could provide other capabilities to the
surgeon, in combination with a hemostatic capability, in a single
surgical instrument.
SUMMARY OF THE INVENTION
[0004] In accordance with an embodiment of the present invention, a
multi-function surgical instrument is provided. The surgical
instrument includes a catheter, a bipolar hemostat assembly, an
attachment member, and a surgical tool. The bipolar hemostat
assembly includes an electrical connector at a proximal end, a
bipolar electrode assembly at a distal end, and first and second
electrical leads extending from the proximal end to the distal end
and disposed within the catheter. The bipolar electrode assembly
includes an aperture that extends axially therethrough. The
attachment member is disposed within the catheter and has a
proximal end and a distal end where the distal end is movable
within the aperture of the bipolar electrode assembly between a
first position wherein the distal end is extended from the bipolar
electrode assembly and a second position wherein the distal end is
retracted within the bipolar electrode assembly. The surgical tool
is attached to the distal end of the attachment member.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 illustrates a first embodiment for a multi-finction
surgical instrument in accordance with the present invention.
[0006] FIG. 2 is a view of the distal end of the surgical
instrument of FIG. 1.
[0007] FIG. 3 illustrates an embodiment for the configuration of
the attachment between the snare and injection needle.
[0008] FIG. 4 illustrates the surgical instrument of FIG. 1 in a
second position where the snare has been retracted within the
bipolar electrode assembly.
[0009] FIG. 5 is a view of a distal end of a surgical instrument in
the second position where the snare has been retracted within the
bipolar electrode assembly.
[0010] FIG. 6 illustrates a second embodiment for the geometric
configuration for a snare loop of the present invention.
[0011] FIG. 7 illustrates a third embodiment for the geometric
configuration for a snare loop of the present invention.
[0012] FIG. 8 illustrates a fourth embodiment for the geometric
configuration for a snare loop of the present invention.
[0013] FIG. 9 illustrates a fifth embodiment for the geometric
configuration for a snare loop of the present invention.
[0014] FIG. 10 illustrates a sixth embodiment for the geometric
configuration for a snare loop of the present invention.
[0015] FIG. 11 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where
the needle hub is restrained against rotation.
[0016] FIG. 12 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where
the needle hub is rotatable.
[0017] FIG. 13 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where
the snare is attached to an attachment member.
[0018] FIG. 14 is a view of the distal end of the instrument of
FIG. 13.
[0019] FIG. 15 illustrates a first embodiment for the attachment of
the snare to the attachment member for the embodiment of the
instrument of FIG. 13.
[0020] FIG. 16 illustrates a second embodiment for the attachment
of the snare to the attachment member for the embodiment of the
instrument of FIG. 13.
[0021] FIG. 17 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where a
grasper/forceps device is attached to a support member.
[0022] FIG. 18 is a view of the distal end of the instrument of
FIG. 17.
[0023] FIG. 19 illustrates an embodiment of a configuration for a
grasper/forceps device of the present invention.
[0024] FIG. 20 illustrates a second embodiment for the
configuration for the grasper/forceps device of the present
invention.
[0025] FIG. 21 illustrates a third embodiment for the configuration
for the grasper/forceps device of the present invention.
[0026] FIG. 22 illustrates a fourth embodiment for the
configuration for the grasper/forceps device of the present
invention.
[0027] FIG. 23 illustrates a fifth embodiment for the configuration
for the grasper/forceps device of the present invention.
[0028] FIG. 24 illustrates a sixth embodiment for the configuration
for a grasper/forceps device of the present invention.
[0029] FIG. 25 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where a
scraper/forceps device is attached to a support member.
[0030] FIG. 26 is a view of the distal end of the instrument of
FIG. 25.
[0031] FIG. 27 illustrates an embodiment of a configuration for a
scraper/forceps device of the present invention.
[0032] FIG. 28 is a front view of the scraper/forceps device of
FIG. 27.
[0033] FIG. 29 illustrates a second embodiment for the
configuration for the scraper/forceps device of the present
invention.
[0034] FIG. 30 is a front view of the scraper/forceps device of
FIG. 29.
[0035] FIG. 31 illustrates a third embodiment for the configuration
for the scraper/forceps device of the present invention.
[0036] FIG. 32 is a front view of the scraper/forceps device of
FIG. 31.
[0037] FIG. 33 illustrates a fourth embodiment for the
configuration for the scraper/forceps device of the present
invention.
[0038] FIG. 34 is a front view of the scraper/forceps device of
FIG. 33.
[0039] FIG. 35 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where a
retrieval basket is attached to a support member.
[0040] FIG. 36 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where a
cytology brush is attached to a support member.
[0041] FIG. 37 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where a
balloon has been added to the outside diameter of the catheter.
[0042] FIG. 38 illustrates a balloon hub that could be attached to
the catheter for use with the surgical instrument of FIG. 37.
[0043] FIG. 39 illustrates an alternative embodiment for the
multi-function surgical instrument of the present invention where
the shaft comprises a cryotherapy tube.
DETAILED DESCRIPTION
[0044] FIG. 1 illustrates a first embodiment for the multi-function
surgical instrument 100 in accordance with the present invention.
As can be seen in FIG. 1, surgical instrument 100 includes a
bipolar hemostat assembly 110, an irrigation assembly 130, and a
needle assembly 150.
[0045] Bipolar hemostat assembly 110 includes an RF generator
connector 112, electrical leads 114, and a bipolar electrode
assembly 120. RF generator connector 112 is located at a proximal
end 102 of the multi-function surgical instrument 100 and is
utilized to provide connection to an RF generator (not shown) in
accordance with well-known principles. Electrical leads 114 extend
from RF generator connector 112 through the surgical instrument 100
and terminate at the bipolar electrode assembly 120, which is
located at the distal end 104 of the surgical instrument 100. As
such, an electrical current can be provided from RF generator
connector 112 to the bipolar electrode assembly 120 through
electrical leads 114. Electrical leads 114 extend from RF generator
connector 112 through extension tube 108A. The electrical leads 114
pass through the catheter hub, or bifurcation, 108B and enter the
catheter main shaft 108 of the surgical instrument 100. The
electrical leads 114 pass through the catheter main shaft 108 which
extends through body 101 of surgical instrument 100 and terminate
at bipolar electrode assembly 120. As can be seen in FIGS. 1 and 2,
and as will be described further later in this specification,
electrical leads 114 consist of a first lead 114A and second lead
114B. As such, in accordance with well-known principles, the
bipolar electrode assembly 120, when energized by an electrical
current through leads 114, provides hemostatic therapy to a
patient.
[0046] Irrigation assembly 130 includes an irrigation hub 132.
Irrigation hub 132 is attached to catheter main shaft 108, which
passes through catheter hub 108B. Irrigation hub 132 is provided to
attach to an irrigation pump (not shown in FIG. 1). The irrigation
pump would provide fluid to irrigation hub 132 where the fluid
would pass through the catheter main shaft 108 through the length
of surgical instrument 100. The fluid passes through a central
lumen 121 (not visible in FIG. 1) that is included in bipolar
electrode assembly 120 to be delivered to a site within the body of
a patient. Thus, through irrigation assembly 130, fluid to irrigate
a site within a patient's body can be provided by surgical
instrument 100.
[0047] The electrical leads 114 of the bipolar hemostat assembly
110 and the irrigation fluid provided by the irrigation assembly
130 both pass through the catheter main shaft 108. As such, the
electrical leads 114 are insulated conductors such that they are
electrically isolated from the irrigation fluid that is carried
through catheter main shaft 108.
[0048] Catheter hub, or bifurcation, 108B contains an internal seal
that is provided to prevent irrigation fluid from the irrigation
assembly 130 from traveling proximally along surgical instrument
100 through extension tube 108A. Thus, irrigation fluid is able to
be pass through catheter main shaft 108, however, the irrigation
fluid is not able to "back flow" through extension tube 108A and
contact RF connector 112.
[0049] The multi-function surgical instrument 100 also contains
needle assembly 150. Needle assembly 150 includes an injection
needle 152 and is utilized to inject a fluid into a site within the
patient's body. As can be seen in FIG. 1, needle assembly 150
includes injection needle 152, needle hub 151, and needle operator
156. Injection needle 152 extends at its proximal end from needle
hub 151 through body 101 of surgical instrument 100. Needle 152
extends through catheter main shaft 108 and is received within the
central lumen 121 of the bipolar electrode assembly 120. Needle
operator 156 is utilized to provide injection fluid to needle
assembly 150 for delivery to the patient through needle 152. Needle
hub 151, which carries needle 152 at its distal end, is slidably
mounted within body 101 of surgical instrument 100 such that needle
152 may be moved distally through bipolar electrode assembly 120
such that the injection needle tip 154 extends externally from the
bipolar electrode assembly 120. Needle hub 151 is also able to be
moved in a proximal direction with respect to body 101 such that
injection needle tip 154 is able to be retracted within lumen 121
of bipolar electrode assembly 120. The user of surgical instrument
100 is able to grip needle hub 151 at the needle operator 156 in
order to move needle assembly 150 both distally and proximally
along body 101.
[0050] Body 101 contains a seal that surrounds catheter main shaft
108, which passes therethrough. Needle 152, as it passes through
body 101, penetrates the seal that surrounds the main shaft 108 and
the wall of the main shaft 108 to extend through main shaft 108 to
the distal end 104 of surgical instrument 100. The seal is provided
in body 101 and around main shaft 108 to prevent the irrigation
fluid that is also carried in main shaft 108 from exiting the shaft
and body 101 at the location where needle 152 penetrates the main
shaft 108. Body 101 also includes strain relief members 109. Strain
relief members 109 are disposed on body 101 and are used to attach
catheter 108 to body 101 at the proximal and distal ends of body
101.
[0051] FIG. 2 provides a more detailed view of the distal end 104
of the surgical instrument 100 so that the configuration of the
injection needle 152, electrical leads 114A, 114B, and bipolar
electrode assembly 120 can be more clearly seen. In order to
provide this more detailed view of the distal end 104 of the
surgical instrument 100, a portion of main shaft 108 has been cut
away such that the components referred to above may be more clearly
visualized.
[0052] As can be seen in FIG. 2, bipolar electrode assembly 120
consist of a cylindrical body portion 126, a hemispherical distal
end tip 127 and a shank portion 128. Discrete spiral electrodes
129A and 129B are disposed on the outer surface of the cylindrical
body portion 126 and the hemispherical distal end tip 127. Each of
the spiral electrodes 129A and 129B connect to one of the
electrical leads 114A and 114B.
[0053] As can be visualized in FIG. 2, bipolar electrode assembly
120 contains a lumen 121 that extends centrally and axially
therethrough and which receives injection needle 152 within it. As
can be seen in FIG. 2, injection needle tip 154 has been extended
from bipolar electrode assembly 120. Bipolar electrode assembly 120
is a gold plated ceramic tip and each electrical lead 114A and 114B
is connected to a different one of the spiral electrodes 129A, 129B
with a conductive epoxy.
[0054] As can be further seen in FIG. 2, injection needle 152
extends through catheter 108 and may be comprised of two portions.
In the embodiment of FIG. 2, injection needle 152 consists of a 22
gauge hypotube 152A into which is welded a 25 gauge needle 152B at
the distal end 152AA of the hypotube 152A. The 25 gauge needle 152B
is received within a guide tube 190 which extends proximally from
shank portion 128 of the bipolar electrode assembly 120. Guide tube
190 defines a lumen which is axially aligned with lumen 121 that is
included in bipolar electrode assembly 120. Guide tube 190 serves
to guide injection needle 152 into the bipolar electrode assembly
120 and also acts as a positive stop which allows for the needle to
only extend a predetermined length beyond the hemispherical distal
end tip 127 of bipolar electrode assembly 120. This stop feature is
accomplished by utilizing the structures of the distal end 152AA of
hypotube 152A and the proximal end 190A of guide tube 190. As can
be understood, as injection needle 152 is moved distally within
catheter 108 and is received within guide tube 190, eventually the
distal end 152AA of hypotube 152A will abut the proximal end 190A
of guide tube 190 such that the injection needle 152 can not be
inserted any further within guide tube 190. This interaction of the
hypotube 152A and the guide tube 190 serves as a positive stop for
limiting the distance that injection needle 152 can be extended
from the surgical instrument 100.
[0055] As can be also seen in FIG. 2, guide tube 190 also includes
a plurality of holes 192 that extend completely through the wall
structure of guide tube 190. The purpose of the holes 192 in guide
tube 190 is to permit the irrigation fluid that is carried through
catheter 108 to flow through the guide tube from outside of the
guide tube such that it is able to enter and pass through lumen 121
in bipolar electrode assembly 120 for delivery to the body of the
patient. The guide tube 190 can be attached to the bipolar
electrode assembly 120 through any of a variety of methods, one of
which is by utilizing an epoxy to secure the tube to the electrode
assembly.
[0056] A multi-function surgical instrument that includes a
hemostat capability, an irrigation capability, and an injection
needle capability is disclosed in U.S. Pat. Nos. 5,336,222 and
5,522,815 and the two above-referenced patents are incorporated
herein in their entirety.
[0057] In returning to FIGS. 1 and 2, it can also be seen that
multi-function surgical instrument 100 includes a snare device 170.
As will be described in more detail later in this specification,
snare 170 is directly attached to injection needle 152 and can be
extended from, and retracted into, bipolar electrode assembly 120
by moving needle 152 distally and proximally, respectively, within
bipolar electrode assembly 120. Snare 170 includes a snare loop 172
that can be deployed in an operative configuration when the
injection needle 152 has been extended from bipolar electrode
assembly 120. The snare loop 172 can be retracted into the bipolar
electrode assembly 120 by retracting needle 152 within the bipolar
electrode assembly 120. Thus, the operation of snare 170 is
controlled by the operator through movement of needle assembly 150.
Since the snare 170 is directly attached to injection needle 152,
as the injection needle is extended from the bipolar electrode
assembly 120 the snare loop 172 will be deployed from the bipolar
electrode assembly 120 and as the needle 152 is retracted into the
bipolar electrode assembly 120 the snare loop 172 will also be
retracted within the bipolar lectrode assembly 120.
[0058] Snare 170 is utilized to perform a procedure on a patient in
accordance with well-known principles. For example, a polyp that is
to be removed from a patient can be captured within snare loop 172.
As such, snare 170 can be either an electrically energized snare or
a non-electrical snare. With either embodiment, snare 170 can be
utilized to capture tissue within the body of a patient.
[0059] FIGS. 1 and 2 illustrate snare 170 as a monopolar snare
wire. As such, a snare electrical connector 174 is provided at the
proximal end 102 of surgical instrument 100 on needle operator 156.
An electrical lead (not visible) extends from snare electrical
connector 174 to snare loop 172 to carry an electrical current from
an RF generator (not shown) through electrical connector 174 to
snare loop 172. The electrical lead passes from electrical
connector 174 to snare loop 172 through catheter main shaft 108 and
thus is insulated such that it is electrically isolated from the
irrigation fluid that also passes through catheter main shaft
108.
[0060] FIGS. 1 and 2 illustrate snare 170 in a first position where
snare loop 172 has been deployed from the bipolar electrode
assembly 120. As such, needle hub 151 has been moved distally along
body portion 101 of the surgical instrument 100. Since the snare is
directly attached to the injection needle 152, this distal movement
of needle hub 151 will deploy snare loop 172 from the bipolar
electrode assembly 120.
[0061] FIG. 3 illustrates a configuration for the attachment
between snare 170 and injection needle 152. As can be seen, snare
170 is comprised of a snare loop 172 and a snare attachment portion
174. In the configuration of FIG. 3, snare loop 172 is an
elliptical-shaped loop, however, as will be explained further later
in this specification, snare loop 172 can be formed in any of a
variety of different geometric shapes. Attachment portion 174 is
utilized to attach snare 170 to injection needle 152. The
attachment of snare 170 to injection needle 152 extends from
attachment point 176 at a distal end of injection needle 152 in a
proximal direction along injection needle 152. Attachment point 176
is located a sufficient distance in a proximal direction from
needle tip 154 such that the snare loop 172 does not impede the use
of needle tip 154 for injecting fluid into the body of a patient.
The distance between the distal end of the needle tip 154 and
attachment point 176 is not rigidly defined, however, as described
above, the distance is sufficient to permit operation of both the
snare 170 and the injection needle 152. Additionally, the
attachment portion 174 of snare 170 can extend any distance along
injection needle 152. A design consideration in determining the
length of attachment portion 174 is to provide sufficient strength
for the attachment between snare 170 and injection needle 152 such
that snare 170 can be utilized for its intended purposes without
detaching from injection needle 152.
[0062] As discussed previously, snare 170 can either be an
electrically energized snare or a non-energized snare and, as such,
snare 170 can be manufactured from a variety of materials. For
example, snare 170 can be manufactured from Nitinol, stainless
steel or other metals, composites, or rigid polymers. The snare
loop may be either a single strand wire or a multi-stranded,
braided, or twisted wire. Likewise, injection needle 152 may be
manufactured from a variety of materials including metals or
plastics. As such, the method of attachment between snare 170 and
injection needle 152 is in-part dependent upon the materials that
are utilized to form snare 170 and injection needle 152. However,
the present invention is not limited to any particular method of
attaching snare 170 to injection needle 152. As discussed above,
depending upon the materials that are utilized to manufacture each
of the snare 170 and injection needle 152, the snare 170 could be
attached to needle 152 through soldering, welding, swaging,
crimping, or by utilizing an adhesive.
[0063] FIGS. 4 and 5 illustrate surgical instnument 100 in a second
position where snare 170 has been retracted within bipolar
electrode assembly 120. As can be seen, needle hub 151 has now been
moved proximally along body 101 of surgical instrument 100. This
proximal movement of needle hub 151 will also move needle 152
proximally within catheter main shaft 108 which will retract
injection needle tip 154 within bipolar electrode assembly 120.
Again, since snare 170 is attached to injection needle 152,
retraction of injection needle 152 within bipolar electrode
assembly 120 will also retract snare loop 172 of snare 170 within
the bipolar electrode assembly such that the snare loop 172 is not
now in an operative position at the distal end 104 of surgical
instrument 100.
[0064] As can be seen in greater detail in FIG. 5, the retraction
of injection needle 152 has caused snare loop 172 to collapse and
be received within lumen 121 of bipolar electrode assembly 120. It
is understood that injection needle 152 must be retracted within
bipolar electrode assembly 120 a sufficient distance if snare loop
172 is to be entirely received within lumen 121 of the bipolar
electrode assembly 120.
[0065] As was mentioned previously, snare loop 172 of snare 170 can
be formed in any of a variety of geometric configurations. FIGS.
6-10 illustrate several of the alternative embodiments for the
geometric configuration for the snare loop of the present
invention. As can be seen in FIG. 6, snare loop 172A is configured
in a four-sided diamond-shaped configuration. Attachment portion
174A extends from the snare loop 172A for attachment to an
injection needle as described previously. FIG. 7 illustrates a
circular snare loop 172B attached to a snare attachment portion
174B.
[0066] FIGS. 8, 9, and 10 illustrate triangular snare loop 172C, an
octagonally-configured snare loop 172D, and a six-sided snare loop
172E, respectively. Snare loops 172C, 172D, and 172E are formed
with snare attachment portions 174C, 174D, and 174E, respectively.
As was mentioned previously for elliptical snare loop 172 for snare
170, the snare loops and snare attachment portions illustrated in
FIGS. 6-10 may be formed from any of a variety of materials
previously described and contemplated by those skilled in the art
and may be attached to an injection needle by any of the methods
previously described or by any method contemplated by one skilled
in the art.
[0067] Figure 11 illustrates an embodiment for the multi-function
surgical instrument 100 where the needle hub 151 can be prevented
from rotation about its longitudinal axis within body 101 of the
surgical instrument 100. Surgical instrument 100, as illustrated in
FIGS. 11 and 12, does not show the bipolar hemostat assembly 110,
irrigation assembly 130, and snare 170 as discussed previously,
however, those assemblies could be incorporated into the embodiment
of the instruments of FIGS. 11 and 12 and their illustration is not
required for purposes of describing the features to be discussed in
FIGS. 11 and 12.
[0068] As mentioned above, the embodiment of surgical tool 100 in
FIG. 11 is capable of preventing rotation of needle hub 151. As
such, needle hub 151 includes anti-rotation structure 151A at a
distal end 153 of needle hub 151. The anti-rotation structure 151A
is a flat, planar member that is formed in either a square or
rectangular shape. This structure is received within needle hub
receiving structure 101A which is included on body 101 of the
surgical instrument 100. As the needle hub 151 is moved distally
along body 101 in order to extend the injection needle from the
distal end of the surgical instrument, the anti-rotation structure
151A is received within the needle hub receiving structure 101A. As
can be understood, when the anti-rotation structure 151A is
received within the needle hub receiving structure 101A, due to the
complimentary structural configuration of the two structures, the
needle hub 151 is not able to be rotated when it is in this
position on body 101.
[0069] FIG. 12 illustrates an embodiment for surgical instrument
100 where the needle hub 151 is able to be rotated about its
longitudinal axis within body 101. In order to provide for rotation
of needle hub 151 within body 101, a structure 151B with rounded
edges is provided at the distal end 153 of needle hub 151 . When
the rounded structure 151B is received within needle hub receiving
structure 101A, because it has rounded corners, the needle hub 151
may be rotated even when it is in its distal-most position on body
101. It may be desirable to provide for rotation of needle hub 151
so that the physician utilizing the surgical instrument 100 may
position injection needle 152 and snare 170, which would be
attached to needle 152 as described previously, into any position
that may be helpful to the surgeon in performing a procedure with
the surgical instrument.
[0070] It has been described previously that an injection needle
could be provided within surgical instrument 100 such that an
injection capability was provided to surgical instrument 100. As
was also described previously, a snare could be attached to the
distal end of the injection needle to provide a snare capability to
the surgical instrument. However, it is not required that a needle
be utilized with a surgical instrument in order to provide a snare
capability to the surgical instrument. FIGS. 13 and 14 illustrate
an embodiment for a multi-function surgical instrument 200 that has
a hemostat capability, an irrigation capability and a snare
capability, without requiring an injection capability.
[0071] As can be seen in FIG. 13, multi-function surgical
instrument 200 includes a bipolar hemostat assembly 210 and an
irrigation assembly 230, which operate in accordance with the
principles described previously for the embodiment of surgical
instrument 100. FIG. 13 also illustrates a snare 270 that is
included in surgical instrument 200. However, in the embodiment of
FIGS. 13 and 14 for surgical instrument 200, snare 270 is not
attached to an injection needle, but rather, is attached to the
distal end of an attachment member (not visible in FIG. 13 and 14)
that extends through body 201 of surgical instrument 200 and
through catheter 208. The attachment member extends through a
central lumen that is included in the bipolar electrode assembly
220, as was described previously for the bipolar electrode assembly
120 in the embodiment of FIG. 1.
[0072] As can be seen in FIGS. 15 and 16, snare 270 is attached to
attachment member, or support member or shaft, 280 at the distal
end of shaft 280. As such, snare loop 272 of snare 270 can be
extended from, and retracted into, bipolar electrode assembly 220
by a user gripping operator 278 and moving the attachment member
280 within catheter 208 of surgical tool 200. Thus, adding the
functionality of a snare device to a multi-finction surgical
instnunent is not dependent upon including an injection capability
in the surgical instrument. The surgical instrument 200 can be
provided with a rod or attachment member that extends through the
catheter 208 which includes the snare 270 attached at its distal
end. By retracting the distal end of the attachment member 280
within the bipolar electrode assembly 220, the snare loop 272 of
snare 270 would also be retracted into bipolar electrode assembly
220. By extending attachment member 280 distally from bipolar
electrode assembly 220, the snare loop 272 of snare 270 is deployed
from the distal end of surgical instrument 200.
[0073] FIGS. 15 and 16 illustrate the attachment of snare 270 to
attachment member, or shaft, 280. In the embodiment of FIGS. 15 and
16, shaft 280 is illustrated as a hypotube. In FIG. 15, shaft
attachment portion 274 of snare 270 has been inserted into shaft,
280 and in FIG. 16 shaft attachment portion 274 has been attached
to the outer circumference of shaft 280. Snare 270 can be fixed to
shaft 280 by utilizing any of a variety of attachment methods and
snare 270 and shaft 280 can be formed from any of a variety of
materials. For example, snare 270 could be joined to shaft 280 by
soldering, welding, swaging, crimping, or utilizing an adhesive.
Additionally, snare loop 272 of snare 270 can be configured in any
of the geometric shapes as was described previously in FIGS.
6-10.
[0074] FIGS. 17 and 18 illustrate an embodiment for multi-ftmction
surgical instrument 200, which includes a shaft 280 within it,
where a grasper/forceps device has been attached to the distal end
of the shaft 280. Therefore, in this embodiment for surgical
instrument 200, the snare loop capability has been exchanged for a
grasper/forceps capability. The grasper/forceps 370 is attached to
the distal end of shaft 280 and thus is able to be extended from,
and retracted into, bipolar electrode assembly 220 through movement
of shaft 280 within catheter 208.
[0075] The grasper/forceps device 370, as was previously described
for snare 270, can be attached to the distal end of shaft 280
through any of a variety of methods and the present invention is
not limited to any particular method of attachment between
grasper/forceps 370 and shaft 280. All that is required is that
grasper/forceps 370 be attached to shaft 280 such that as shaft 280
is withdrawn into bipolar electrode assembly 220, the
grasper/forceps 370 is also retracted within bipolar electrode
assembly 220. As the grasper/forceps 370 is retracted into the
bipolar electrode assembly 220, the engagement of the fingers 372
of the grasper/forceps 370 with the structure defining the lumen in
bipolar electrode assembly 220 will collapse the fingers 372 and
converge the fingers 372 together such that they are able to grasp
tissue within the body of a patient.
[0076] As was discussed previously, where the snare loop could be
configured in any of a variety of geometric shapes, the
grasper/forceps 370 can also be formed in a variety of different
configurations. FIGS. 19-24 illustrate several of the different
configurations that could be utilized for grasper/forceps 370. As
can be seen in FIG. 19, grasper/forceps 370 is comprised of three
fingers 372. Each finger 372 includes a hook 374 at the distal end
of the finger. The hook is provided to provide additional grasping
capability to the grasper/forceps 370. FIGS. 20-24 provide front
views of several of the various alternative configurations that
could be utilized for the grasper/forceps 370. FIGS. 20-24
illustrate configurations 370A through 370E, respectively, for the
grasper forceps 370. As can be seen, the grasper/forceps 370 can
include any number of fingers with any relative positioning of the
fingers within the grasper/forceps 370.
[0077] FIGS. 25 through 36 illustrate several additional
embodiments for the surgical instrument of the present invention.
As illustrated, other surgical tools could be included in the
surgical instrument to provide additional capabilities to the
multi-function surgical instrument 200.
[0078] As is illustrated in FIGS. 25 and 26, a scraper/forceps
device 470 is attached to the distal end of shaft 280. Again, the
scraper/forceps 470 would be extended from bipolar electrode
assembly 220 by distally moving shaft 280 within catheter 208 and
scraper/forceps 470 would be retracted into the bipolar electrode
assembly by proximally moving shaft 280 within catheter 208. Again,
the scraper/forceps 470 could be manufactured from any of a variety
of materials and can be attached to shaft 280 by any of a variety
of attachment methods.
[0079] Additionally, scraper/forceps 470 can be configured in any
of a variety of physical configurations. FIGS. 27 and 28 illustrate
a first possible configuration for a scraper/forceps device. As can
be seen in FIGS. 27 and 28, scraper/forceps 470A is comprised of a
single finger 472A which includes a scraper portion 474A at its
distal end. FIGS. 29 and 30 illustrate a second possible
configuration for the scraper/forceps and illustrates the
scraper/forceps 470B as a single, elongated, cylindrical structure.
FIGS. 31 and 32 illustrate a third possible configuration for a
scraper/forceps device. In the embodiment of FIGS. 31 and 32,
scraper/forceps 470C is comprised of a first finger 472C and a
second finger 473C. First finger 472C includes a scraper portion
474C at its distal end and second finger 473C includes a scraper
portion 475C at its distal end. FIGS. 33 and 34 illustrate a fourth
possible configuration for a scraper/forceps device where
scraper/forceps 470D is comprised of four fingers, namely fingers
472D, 473D, 474D, and 475D. Each finger includes a scraper portion
at a distal end thereof.
[0080] FIG. 35 illustrates an embodiment for surgical instrument
200 where a retrieval basket 570 has been attached to the distal
end of shaft 280. The retrieval basket can be formed in any of a
variety of configurations and would be retracted into, and extended
from, bipolar electrode assembly 220 through movement of shaft 280
as previously described. Retrieval basket 570 could be utilized in
accordance with well-known principles to capture a foreign body
from within the body of a patient. The combination bipolar
electrode assembly 220 and retrieval basket 570 would provide a
single device to control bleeding from a foreign body while using
the basket to remove the foreign body. Another use would be polyp
or tissue retrieval after polypectomy or mucosectomy when the
bipolar electrode assembly is used to treat post-procedural
bleeding. The basket can also assist in adherent clot removal prior
to cautery.
[0081] FIG. 36 illustrates an embodiment for surgical instrument
200 where a cytology brush 670 has been attached to the distal end
of shaft 280. The cytology brush 670 would be used in accordance
with well-known principals, e.g., for sampling for H Pylori before
or after ulcer cautery.
[0082] FIG. 37 illustrates an embodiment for the multi-ftuction
surgical instrument where a balloon 770 has been added to the
outside diameter of the catheter main shaft 208. The balloon 770 is
disposed on the outside diameter of the catheter 208 and in a
proximal direction with respect to bipolar electrode assembly 220.
In order to provide for inflation and deflation of balloon 770, a
balloon hub 772, as illustrated in FIG. 38, would be provided at
the proximal end of the surgical instrument and could be provided
as an extrusion off of the catheter main shaft 208. A lumen could
be provided from the balloon hub 772, either through the main
catheter shaft 208 or external to the main catheter shaft 208, to
extend to balloon 770 for inflation and deflation of balloon 770.
It should be understood that a balloon device 770 as illustrated in
FIG. 37 could be utilized with any of the other previously
discussed embodiments for the multi-function surgical
instrument.
[0083] FIG. 39 illustrates an embodiment for surgical instrument
200 where shaft 280 is a hollow, tube structure and comprises a
cryotherapy tube. The cryotherapy tube 870 extends through the
lumen included in bipolar electrode assembly 220 and can be used to
provide any of a variety of different gases 875, e.g., nitrous
oxide, liquid nitrogen, or other gases for freezing and ablating
tissue, within the body of the patient. The cryotherapy tube 870
can be extended from the bipolar electrode assembly 220 and
retracted into the bipolar electrode assembly 220.
[0084] The above-described embodiments illustrate that a variety of
different surgical tools can be incorporated into the
multi-function surgical instrument of the present invention.
Whereas a variety of these different types of surgical tools have
been described, it can be contemplated that the multi-finction
surgical instrument can include any of a variety of other surgical
tools. The additional surgical tools could be attached to either an
injection needle assembly or an attachment member as was described
herein. Thus, the present invention is not limited to only
incorporating the tools as described herein in the multi-function
surgical instrument. It is evident that one skilled in the art
could contemplate other surgical tools being incorporated into the
multi-function surgical instrument of the present invention and the
teachings of the present invention could be utilized to implement
these tools in the surgical instrument.
[0085] Additionally, it is not required that the hemostat assembly
be a bipolar hemostat. The present invention can be practiced with
a monopolar hemostat. The monopolar hemostat would include an
aperture that would extend axially therethrough and which would
accommodate a surgical tool within it.
[0086] As discussed above, the disclosed embodiments are
illustrative of the various ways in which the present invention may
be practiced. Other embodiments can be implemented by those skilled
in the art departing from the spirit and scope of the present
invention.
* * * * *