U.S. patent application number 17/026363 was filed with the patent office on 2021-01-07 for systems and methods facilitating reprocessing of surgical instruments.
The applicant listed for this patent is Covidien LP. Invention is credited to James D. Allen, IV, John R. Twomey.
Application Number | 20210001443 17/026363 |
Document ID | / |
Family ID | |
Filed Date | 2021-01-07 |
![](/patent/app/20210001443/US20210001443A1-20210107-D00000.png)
![](/patent/app/20210001443/US20210001443A1-20210107-D00001.png)
![](/patent/app/20210001443/US20210001443A1-20210107-D00002.png)
![](/patent/app/20210001443/US20210001443A1-20210107-D00003.png)
![](/patent/app/20210001443/US20210001443A1-20210107-D00004.png)
![](/patent/app/20210001443/US20210001443A1-20210107-D00005.png)
![](/patent/app/20210001443/US20210001443A1-20210107-D00006.png)
United States Patent
Application |
20210001443 |
Kind Code |
A1 |
Twomey; John R. ; et
al. |
January 7, 2021 |
SYSTEMS AND METHODS FACILITATING REPROCESSING OF SURGICAL
INSTRUMENTS
Abstract
A method of sharpening a cutting edge of a knife of a surgical
instrument includes manipulating an end effector assembly of a
surgical instrument such that first and second jaw members of the
end effector assembly are disposed in a spaced-apart position,
retaining the first and second jaw members in the spaced-apart
position, advancing a knife of the surgical instrument to an
extended position wherein the knife extends between the first and
second jaw members, retaining the knife in the extended position,
and sharpening a cutting edge of the knife.
Inventors: |
Twomey; John R.; (Longmont,
CO) ; Allen, IV; James D.; (Broomfield, CO) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Covidien LP |
Mansfield |
MA |
US |
|
|
Appl. No.: |
17/026363 |
Filed: |
September 21, 2020 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
15960849 |
Apr 24, 2018 |
10780544 |
|
|
17026363 |
|
|
|
|
Current U.S.
Class: |
1/1 |
International
Class: |
B24B 3/36 20060101
B24B003/36; A61B 17/32 20060101 A61B017/32; B08B 3/08 20060101
B08B003/08; A61B 90/70 20060101 A61B090/70 |
Claims
1. A system for sharpening a cutting edge of a knife of a surgical
instrument, the system comprising: a jack configured to retain
first and second jaw members of an end effector assembly of a
surgical instrument in a spaced-apart position relative to one
another; a clamp configured to retain a knife of the surgical
instrument in an extended position wherein the knife extends
between the first and second jaw members in the spaced-apart
position thereof; and a sharpener configured to sharpen a cutting
edge of the knife while the jack retains the first and second jaw
members in the spaced-apart position and the clamp retains the
knife in the extended position.
2. The system according to claim 1, further comprising a fixture
configured to receive and retain at least a portion of the end
effector assembly therein.
3. The system according to claim 2, wherein the fixture is
configured to receive and retain one of the first or second jaw
members in fixed position therein.
4. The system according to claim 2, wherein the clamp is configured
to engage the fixture to retain the clamp in position.
5. The system according to claim 1, wherein the jack includes a
base, a shaft, and a support, the support configured to engage one
of the first or second jaw members to retain the first and second
jaw members in the spaced-apart position.
6. The system according to claim 5, wherein the support is slidable
along the shaft and relative to base to move the one of the first
or second jaw members to thereby move the first and second jaw
members to the spaced-apart position.
7. The system according to claim 1, wherein the clamp is configured
to engage the knife at a position spaced-apart from the cutting
edge of the knife.
8. The system according to claim 7, wherein the position is
proximally spaced-apart from the cutting edge of the knife.
9. The system according to claim 1, further comprising a grasping
device configured to grasp the knife to enable pulling of the knife
to the extended position.
10. The system according to claim 9, further comprising a pull-wise
connected to the grasping device, wherein the pull wire is
actuatable to pull the knife to the extended position.
11. The system according to claim 1, wherein the sharpener is
manually operated.
12. The system according to claim 1, wherein the sharpener is
powered.
13. The system according to claim 1, wherein the sharpener is one
of: a jig-assisted sharpener, a sharpening stone-based sharpener, a
push-through sharpener, a grinder sharpener, or a belt
sharpener.
14. The system according to claim 1, wherein the sharpener is
movable from a first position, wherein the sharpener is
spaced-apart from the knife, to a second position, wherein the
sharpener is adjacent the cutting edge of the knife to enable
sharpening thereof.
15. The system according to claim 1, wherein the clamp is
configured to engage the jack to retain the clamp in position.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent
application Ser. No. 15/960,849, filed on Apr. 24, 2018, the entire
contents of which are hereby incorporated herein by reference.
BACKGROUND
Technical Field
[0002] The present disclosure relates to surgical instruments and,
more particularly, to systems and methods facilitating reprocessing
of surgical instruments.
Background of Related Art
[0003] Multi-function surgical instruments are beneficial in that
they allow multiple surgical tasks to be performed with a single
instrument, obviating the need to alternatingly remove and insert
different instruments for performing different surgical tasks.
However, in order to provide additional functionality, additional
components are added that must fit within the spatial and
functional constraints of the instrument. As a result,
multi-function surgical instruments tend to be relatively complex
in their design and manufacture.
[0004] Surgical instrument can generally be categorized as reusable
instruments (e.g., instruments that are cleaned and/or sterilized),
disposable instruments (e.g., instruments that are entirely
discarded after a single use), and reposable instruments (e.g.,
instruments wherein portions are disposable and other portions are
reusable after cleaning and/or sterilization). A new class of so
called reprocessed instruments has recently been introduced by
manufacturers. Typically, these reprocessed instruments are
disposable instruments (or reposable instruments) that are
collected after a surgical use and returned to a manufacturer where
the instruments are disassembled, cleaned/disinfected, refurbished,
re-assembled, sterilized and sold as reprocessed instruments. In
many cases, most of the original parts of an instrument are re-used
to provide the necessary parts for reassembly of the same
instrument. Parts that wear during use, are broken during
disassembly, and/or are otherwise unable to be reprocessed as-is
may be refurbished, modified, and/or alternatively replaced with
replacement components.
[0005] With respect to reprocessing of certain surgical
instruments, such as multi-function surgical instruments, efficient
and effective disassembly, cleaning/disinfection, component
replacement, component refurbishment, reassembly, and sterilization
can be challenging. There is therefore a need for systems and
methods facilitating reprocessing of surgical instruments.
SUMMARY
[0006] As used herein, the term "distal" refers to the portion that
is being described that is further from a user, while the term
"proximal" refers to the portion that is being described that is
closer to a user. Further, to the extent consistent, any of the
aspects described herein may be used in conjunction with any of the
other aspects described herein.
[0007] Provided in accordance with aspects of the present
disclosure is a method of sharpening a cutting edge of a knife of a
surgical instrument including manipulating an end effector assembly
of a surgical instrument such that first and second jaw members of
the end effector assembly are disposed in a spaced-apart position,
maintaining the first and second jaw members in the spaced-apart
position, advancing a knife of the surgical instrument to an
extended position wherein the knife extends between the first and
second jaw members, retaining the knife in the extended position,
and sharpening a cutting edge of the knife.
[0008] In an aspect of the present disclosure, the method further
includes positioning the end effector assembly in a fixture prior
to manipulating the end effector assembly.
[0009] In another aspect of the present disclosure, manipulating
the end effector assembly includes operably positioning a jack
between the first and second jaw members and actuating the jack to
move the first and second jaw members to the spaced-apart position.
The jack may further be configured to maintain the first and second
jaw members in the spaced-apart position.
[0010] In still another aspect of the present disclosure,
manipulating the end effector assembly includes moving the first
and second jaw members to the spaced-apart position. In such
aspects maintaining the first and second jaw members in the
spaced-apart position includes positioning a jack between the first
and second jaw members to maintain the first and second jaw members
in the spaced-apart position.
[0011] In yet another aspect of the present disclosure, advancing
the knife includes actuating the knife from a proximal end portion
of a knife assembly including the knife. Alternatively, advancing
the knife includes pulling the knife distally.
[0012] In still yet another aspect of the present disclosure,
retaining the knife in the extended position includes attaching a
clamp to the knife.
[0013] In another aspect of the present disclosure, the method
further includes, prior to manipulating the end effector assembly,
disassembling the surgical instrument such that a front end
assembly including the end effector assembly and the knife is
removed from a remainder of the surgical instrument.
[0014] In another aspect of the present disclosure, the method
further includes, before or after sharpening the cutting edge of
the knife, flushing the front end assembly, e.g., with a cleaning
solution, and/or reassembling the front end assembly with the
remainder of the surgical instrument.
[0015] Another method of sharpening a cutting edge of a knife of a
surgical instrument provided in accordance with aspects of the
present disclosure includes disassembling a surgical instrument to
remove a front end assembly therefrom. The front end assembly
includes an elongated shaft assembly, an end effector assembly
disposed at a distal end of the elongated shaft assembly, and a
knife operably disposed within the elongated shaft assembly. The
method further includes manipulating the end effector assembly such
that first and second jaw members of the end effector assembly are
disposed in a spaced-apart position, maintaining the first and
second jaw members in the spaced-apart position, advancing the
knife to an extended position wherein the knife extends between the
first and second jaw members, retaining the knife in the extended
position, and sharpening a cutting edge of the knife.
[0016] In an aspect of the present disclosure, the method further
includes positioning the end effector assembly in a fixture prior
to manipulating the end effector assembly.
[0017] In another aspect of the present disclosure, manipulating
the end effector assembly includes operably positioning a jack
between the first and second jaw members and actuating the jack to
move the first and second jaw members to the spaced-apart
position.
[0018] In yet another aspect of the present disclosure,
manipulating the end effector assembly includes manually moving the
first and second jaw members to the spaced-apart position.
[0019] In still another aspect of the present disclosure,
maintaining the first and second jaw members in the spaced-apart
position includes positioning a jack between the first and second
jaw members.
[0020] In still yet another aspect of the present disclosure,
advancing the knife includes actuating the knife from a proximal
end portion of a knife assembly including the knife. Alternatively,
advancing the knife includes pulling the knife distally.
[0021] In another aspect of the present disclosure, the method
further includes, before or after sharpening the cutting edge of
the knife, flushing the front end assembly, e.g., with a cleaning
solution, and/or reassembling the front end assembly with the
surgical instrument.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Various aspects of the present disclosure are described
herein with reference to the drawings wherein like reference
numerals identify similar or identical elements:
[0023] FIG. 1 is a perspective view of a multi-function surgical
instrument;
[0024] FIG. 2 is an enlarged, perspective view of a distal end
portion of the surgical instrument of FIG. 1, wherein a deployable
assembly thereof is disposed in a retracted position;
[0025] FIG. 3 is an enlarged, perspective view of the distal end
portion of the surgical instrument of FIG. 1, wherein the
deployable assembly is disposed in a deployed position;
[0026] FIG. 4 is a perspective view of a proximal end portion of
the surgical instrument of FIG. 1 with portions removed to
illustrate the internal working components thereof;
[0027] FIG. 5 is a perspective view of a front end assembly of the
surgical instrument of FIG. 1, with portions thereof removed;
[0028] FIG. 6 is an enlarged, perspective view of the area of
detail indicated as "6" in FIG. 5; and
[0029] FIGS. 7A-7D are side views of a distal end portion of the
front end assembly of FIG. 5 illustrating systems and methods for
sharpening the knife thereof without requiring disassembly of the
front end assembly.
DETAILED DESCRIPTION
[0030] Referring to FIG. 1, a multi-function surgical instrument
provided in accordance with the present disclosure is shown
generally identified by reference numeral 10. Instrument 10 is
configured to operate in both a bipolar mode, e.g., for grasping,
treating, and/or mechanically dissecting tissue, and a monopolar
mode, e.g., for treating and/or electrically/electromechanically
dissecting tissue. Although the present disclosure is shown and
described with respect to instrument 10, the systems and methods
facilitating reprocessing provided in accordance with the present
disclosure are equally applicable for use with any suitable
surgical instrument or portion(s) thereof. Obviously, different
considerations apply to different instruments; however, the aspects
and features of the present disclosure remain generally consistent
regardless of the particular instrument provided. For the purposes
herein, instrument 10 is generally described.
[0031] With reference to FIGS. 1-6, instrument 10 generally
includes a housing 20, a handle assembly 30, a trigger assembly 60,
a rotation assembly 70, an elongated shaft assembly 80, an end
effector assembly 100, a drive assembly 140, a knife assembly 160,
bipolar and monopolar activation assemblies 170, 180, respectively,
a monopolar assembly 200, and a deployment and retraction mechanism
300. Rotation assembly 70, elongated shaft assembly 80, end
effector assembly 100, drive assembly 140, knife assembly 160, and
monopolar assembly 200 together form a front end assembly 400 of
instrument 10 (see FIGS. 5 and 6).
[0032] Instrument 10 also includes an electrosurgical cable (not
shown) that connects instrument 10 to a generator (not shown) or
other suitable power source. The electrosurgical cable includes
wires (not shown) extending therethrough that have sufficient
length to extend through housing 20 and/or elongated shaft assembly
80 in order to provide energy to at least one of the
electrically-conductive surfaces 112, 122 of jaw members 110, 120,
respectively, of end effector assembly 100, e.g., upon activation
of bipolar activation switch 172 of bipolar activation assembly 170
in the bipolar mode of operation. Similarly, one or more of the
wires of the electrosurgical cable extends through housing 20
and/or elongated shaft assembly 80 in order to provide energy to
monopolar assembly 200, e.g., upon activation of either of the
monopolar activation switches 182 of monopolar activation assembly
180 in the monopolar mode of operation.
[0033] Elongated shaft assembly 80 extends distally from housing 20
and supports end effector assembly 100 at a distal end thereof. End
effector assembly 100 includes opposing jaw members 110, 120
pivotably coupled to one another. Each of the jaw members 110, 120
includes an electrically-conductive surface 112, 122 adapted to
connect to the source of energy and defines a bipolar configuration
in use wherein surface 112 is charged to a first electrical
potential and surface 122 is charged to a second, different
electrical potential such that an electrical potential gradient is
created for conducting energy between surfaces 112, 122 and through
tissue grasped therebetween for treating tissue. Bipolar activation
switch 172 of bipolar activation assembly 170 (FIG. 1) is operably
coupled between the source of energy (not shown) and surfaces 112,
122 via one or more wires (not shown), thus allowing the surgeon to
apply bipolar energy to surfaces 112, 122 of jaw members 110, 120,
respectively, of end effector assembly 100 during a bipolar mode of
operation.
[0034] Handle assembly 30 includes a movable handle 40 and a fixed
handle 50. Movable handle 40 is movable relative to fixed handle 50
between an initial position, wherein movable handle 40 is
spaced-apart from fixed handle 50, and a compressed position,
wherein movable handle 40 is compressed towards fixed handle 50.
Drive assembly 140 is operably coupled between handle assembly 30
and end effector assembly 100 such that movement of movable handle
40 between the initial position and the compressed position pivots
jaw member 110 relative to jaw member 120 between the spaced-apart
position and the approximated position, to a threshold force, at
which point movable handle 40 is decoupled from jaw member 110 such
that jaw member 110 is maintained in position despite further
movement of movable handle 40 towards the compressed position. More
specifically, when the threshold force is reached, a compression
spring 142 (FIG. 6) of drive assembly 140 is compressed, decoupling
movable handle 40 from jaw member 110 and allowing further movement
of movable handle 40 towards the compressed position without
impacting the position of jaw member 110. The threshold force is
the force at which the drive force exceeds the spring compression
force of compression spring 142. Thus, when the drive force is less
than or equal to the spring compression force of compression spring
142, movement of movable handle 40 between the initial position and
the compressed position pivots jaw member 110 relative to jaw
member 120 between the spaced-apart position and the approximated
position. On the other hand, when the drive force exceeds the
spring compression force of compression spring 142, jaw member 110
is maintained in position and compression spring 142 is further
compressed in response to movement movable handle 40 towards the
compressed position.
[0035] Continuing with reference to FIGS. 1-4, trigger 62 of
trigger assembly 60 is selectively actuatable relative to housing
20 from an un-actuated position to an actuated position. Knife
assembly 160 is operably coupled to trigger 62 such that actuation
of trigger 62 from the un-actuated position to the actuated
position translates a knife 162 (FIGS. 7B-7D) of knife assembly 160
from a retracted position, wherein knife 162 is disposed proximally
of jaw members 110, 120, to an extended position, wherein knife 162
extends at least partially between jaw members 110, 120 and through
knife channels (not shown) defined within jaw members 110, 120 such
that cutting edge 164 of knife 162 cuts tissue grasped between jaw
members 110, 120. Movable handle 40 may include a protrusion 42
acting as a knife lockout to inhibit actuation of trigger 62 when
movable handle 40 is disposed in the initial position, although
other suitable knife lockouts operably coupled between trigger 62
and movable handle 40 are also contemplated.
[0036] Rotation of rotation wheel 72 of rotation assembly 70
relative to housing 20 effects corresponding rotation of at least a
portion of elongated shaft assembly 80, end effector assembly 100,
drive assembly 140, the knife assembly 160, and monopolar assembly
200 relative to housing 20.
[0037] Monopolar assembly 200 includes an insulative sheath 210 and
an energizable member 220. Insulative sheath 210 is movable
relative to end effector assembly 100 between a storage position,
wherein insulative sheath 210 is disposed proximally of end
effector assembly 100, and a use position, wherein insulative
sheath 210 is substantially disposed about end effector assembly
100. Energizable member 220 is coupled to the source of energy (not
shown) and monopolar activation assembly 180 (FIG. 1) via one or
more wires (not shown) and functions as the active electrode of
monopolar assembly 200. Energizable member 220 is movable together
with insulative sheath 210 and relative to end effector assembly
100 between a storage position, wherein distal tissue-treating
portion 227 of energizable member 220 is positioned
more-proximally, and a use position, wherein distal tissue-treating
portion 227 of energizable member 220 extends distally from end
effector assembly 100 to facilitate treating tissue therewith.
Energizable member 220, more specifically, is engaged with
insulative sleeve 210 such that energizable member 220 and
insulative sleeve 210 move together between their respective
storage and use positions (collectively the storage and use
positions of monopolar assembly 200). In the use position,
insulative sheath 210 serves to electrically insulate end effector
assembly 100 from distal tissue-treating portion 227 of energizable
member 220, while distal tissue-treating portion 227 extends
distally from end effector assembly 100. In the use position,
energy may be supplied to distal tissue-treating portion 227 of
energizable member 220, e.g., via activation of either of the
activation switches 182 of monopolar activation assembly 180 (FIG.
1), for treating tissue in the monopolar mode of operation.
[0038] Deployment and retraction mechanism 300 is configured for
selectively transitioning monopolar assembly 200 between its
storage condition and its use condition. Deployment and retraction
mechanism 300 generally includes a gear box 310 mounted within
housing 20, a gear assembly 320 operably disposed within gear box
310, a pair of input shafts 330 operably coupled to gear assembly
320 and extending transversely from either side of gear box 310 and
outwardly from housing 20 through apertures defined through housing
20, a pair of deployment paddles 340 operably coupled to the input
shafts 330, and a slider 360 disposed within housing 20 and
operably coupling an output of gear assembly 330 with energizable
member 220 of monopolar assembly 200 (which, in turn, is engaged
with insulative sleeve 210) such that deployment and retraction
mechanism 300 is configured to enable both deployment and
retraction of monopolar assembly 200 in a push-push manner, e.g.,
wherein monopolar assembly 200 is both deployed and retracted by
pushing either of paddles 340 in the same direction.
[0039] Referring to FIGS. 4-6, with regard to the disassembly,
cleaning/disinfection, re-assembly, and sterilization of instrument
10 during reprocessing, the various components and assemblies of
instrument 10 and the arrangement thereof make disassembling and
re-assembling time consuming and challenging. Therefore, avoiding
the need to disassemble portions of instrument 10 is advantageous,
assuming the components of these portions to remain in-tact can be
readily reconditioned and sterilized for reuse. With respect to
knife 162 (FIGS. 7B-7D), for example, it has been found that
cutting edge 164 may dull during use, thus requiring sharpening as
part of reprocessing instrument 10. Provided below are systems and
methods enabling sharpening of cutting edge 164 of knife 162
without requiring disassembly of front end assembly 400 of
instrument 10. As such, the disassembly and re-assembly of front
end assembly 400 during reprocessing is obviated.
[0040] In order to reprocess instrument 10, in embodiments, paddles
340 of deployment and retraction mechanism 300 (FIG. 1) are
removed, housing 20 is opened, and the various components therein
are removed. More specifically, the various components coupled to
front end assembly 400 may be decoupled therefrom to enable front
end assembly 400 to be removed as a unit. With front end assembly
400 removed from instrument 10, cutting edge 164 of knife 162 may
be sharpened, as detailed below, without disassembly of front end
assembly 400. In embodiments, instead of separating front end
assembly 400 from instrument 10, cutting edge 164 of knife 162 may
be sharpened similarly as detailed below while instrument 10 is
fully in-tact or partially disassembled (with front end assembly
400 still assembled therewith).
[0041] Turning to FIGS. 7A-7D, and with initial reference to FIG.
7A, in order to sharpen cutting edge 164 of knife 162 without
removing knife 162 from front end assembly 400, front end assembly
400, or at least end effector assembly 100 thereof, is placed in a
fixture 500 to retain end effector assembly 100 in position.
Thereafter, jaw members 110, 120 of end effector assembly 100 are
moved to the spaced-apart position and a jack 510 is positioned to
maintain jaw members 110, 120 in the spaced-apart position. Jack
510 may include a base 512 engaged with or otherwise disposed on
fixture 500, a shaft 514 extending from base 512, and a support 516
disposed at the opposite end of shaft 514 for abutting jaw member
110 to maintain jaw member 110 in the spaced-apart position. Jack
510 may be a stationary fixture or an adjustable fixture. Jaw
members 110, 120 may be manually opened and jack 510 thereafter
positioned to maintain jaw members 110, 120 in the spaced-apart
position, or support 516 of jack 510 may be positioned between jaw
members 110, 120 and jack 510 thereafter actuated (in embodiments
where jack 510 is adjustable) to elongate shaft 514 to urge jaw
member 110 to pivot relative to jaw member 120 to the spaced-apart
position, similar to a car jack. In the former embodiments, jack
510 need not be adjustable and may instead simply be a support
structure for maintaining jaw members 110, 120 in the spaced-apart
position. Other configurations are also contemplated.
[0042] Referring to FIG. 7B, with fixture 500 retaining end
effector assembly 100 and jack 510 maintaining jaw member 110 in
the spaced-apart position, knife 162 is moved to the extended
position. Knife 162 may be moved to the extended position using a
grasping device 520 coupled to a pull wire 522, as shown, may be
moved to the extended position by manipulating knife assembly 160
at the proximal end 165 thereof (see FIG. 6), or may be moved to
the extended position in any other suitable manner.
[0043] With reference to FIG. 7C, once knife 162 is moved to the
extended position, a clamp 530 may be engaged with knife 162 at a
position proximally-spaced from cutting edge 164. Clamp 530 may
also be engaged with shaft 514 of jack 510, as shown, fixture 500,
or any other suitable component to maintain knife 162 in the
extended position.
[0044] Turning to FIG. 7D, with end effector assembly 100 retained,
jaw members 110, 120 disposed in the spaced-apart position, and
knife 162 held in the extended position, a knife sharpener 540 may
be moved into position to sharpen cutting edge 164 of knife 162.
Knife sharpener 540 may be a jig-assisted sharpener, sharpening
stone-based sharpener, push-through sharpener, grinder sharpener,
belt sharpener, or other suitable knife sharpener and may be
manually operated or powered.
[0045] Referring again to FIGS. 7A-7D, once cutting edge 164 of
knife 162 is sufficiently sharpened, clamp 530 and jack 510 are
removed and end effector assembly 100 withdrawn from fixture 500.
Thereafter, front end assembly 400 may be flushed with a suitable
fluid, e.g., a cleaning solution, to clean front end assembly 400
and remove any debris from the sharpening process. In embodiments,
front end assembly 400 may additionally or alternatively be flushed
with a suitable fluid, e.g., a cleaning solution, prior to
sharpening knife 162 to rid any tissue, blood, and/or other debris
accumulated during the previous surgical use, before the sharpening
process is performed as detailed above. Front end assembly 400 may
further be cleaned, refurbished, and/or otherwise reprocessed,
before being re-assembled into instrument 10 and sterilized.
[0046] Referring generally to FIGS. 1-7D, in embodiments,
sharpening of cutting edge 164 of knife 162 is effected without
requiring disassembly of front end assembly 400 from housing 20,
handle assembly 30, or trigger assembly 60 and, in embodiments,
without requiring any disassembly (or minimal disassembly) of
instrument 10. In such embodiments, instrument 10 is placed in
fixture 500 to retain end effector assembly 100 in position and
movable handle 40 is moved to the initial position to move jaw
members 110, 120 of end effector assembly 100 to the spaced-apart
position. Thereafter, jack 510 is positioned to maintain jaw
members 110, 120 in the spaced-apart position. Next, movable handle
40 is moved to the compressed position or sufficiently to the
compressed position such that the knife lockout, e.g., protrusion
42, is cleared and, thus, trigger 62 may be actuated to advance
knife 162 to the extended position. More specifically, with jack
510 maintaining jaw members 110, 120 in the spaced-apart position,
movable handle 40 is moved towards the compressed position with
sufficient force to reach the threshold force such that compression
spring 142 (FIG. 6) is compressed, thus allowing movement of
movable handle 40 towards the compressed position without impacting
the position of jaw members 110, 120 which, as noted above, are
maintained in the spaced-apart position via jack 510. Movable
handle 40 is maintained, e.g., manually held, latched (with a
separate latching device or, in embodiments where so provided, a
latch incorporated into instrument 10), or otherwise retained, in
the compressed or sufficiently compressed position so as to
maintain the knife lockout in a disengaged state.
[0047] Next, trigger 62 is actuated (which is permitted, despite
jaw members 110, 120 being in the spaced-apart position, since the
knife lockout has been cleared, as detailed above), to advance
knife 162 to the extended position. Knife 162 may be maintained in
the extended position via manually holding trigger 62 in the
actuated position, latching (with a separate latching device),
otherwise retaining trigger 62, or by holding knife 162, similarly
as detailed above. Thereafter, cutting edge 164 of knife 162 may be
sharpened similarly as detailed above.
[0048] From the foregoing and with reference to the various drawing
figures, those skilled in the art will appreciate that certain
modifications can also be made to the present disclosure without
departing from the scope of the same. While several embodiments of
the disclosure have been shown in the drawings, it is not intended
that the disclosure be limited thereto, as it is intended that the
disclosure be as broad in scope as the art will allow and that the
specification be read likewise. Therefore, the above description
should not be construed as limiting, but merely as exemplifications
of particular embodiments. Those skilled in the art will envision
other modifications within the scope and spirit of the claims
appended hereto.
* * * * *