U.S. patent application number 17/696014 was filed with the patent office on 2022-06-30 for endoscopic reposable surgical clip applier.
The applicant listed for this patent is Covidien LP. Invention is credited to Henry E. Holsten, Adam I. Lehman, Kathryn L. Spencer.
Application Number | 20220202421 17/696014 |
Document ID | / |
Family ID | |
Filed Date | 2022-06-30 |
United States Patent
Application |
20220202421 |
Kind Code |
A1 |
Holsten; Henry E. ; et
al. |
June 30, 2022 |
ENDOSCOPIC REPOSABLE SURGICAL CLIP APPLIER
Abstract
The present disclosure relates to endoscopic reposable surgical
clip appliers having a reusable handle assembly, at least one
reusable shaft assembly, and at least one disposable clip cartridge
assembly.
Inventors: |
Holsten; Henry E.; (Hamden,
CT) ; Lehman; Adam I.; (Madison, CT) ;
Spencer; Kathryn L.; (Milford, CT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Covidien LP |
Mansfield |
MA |
US |
|
|
Appl. No.: |
17/696014 |
Filed: |
March 16, 2022 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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16507246 |
Jul 10, 2019 |
11298135 |
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17696014 |
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15341292 |
Nov 2, 2016 |
10390831 |
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16507246 |
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62253162 |
Nov 10, 2015 |
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International
Class: |
A61B 17/10 20060101
A61B017/10; A61B 17/128 20060101 A61B017/128; A61B 17/068 20060101
A61B017/068; A61B 17/08 20060101 A61B017/08 |
Claims
1. (canceled)
2. A surgical instrument, comprising: a housing assembly including
a housing, an actuation member and a drive member, wherein
actuation of the actuation member causes actuation of the drive
member; a first assembly including a first drive assembly and being
selectively engagable with the housing assembly, the first assembly
configured to house a plurality of surgical clips therein, wherein
when the first assembly is engaged with the housing assembly,
actuation of the drive member of the housing assembly causes
actuation of the first drive assembly of the first assembly; and a
second assembly including a second drive assembly and being
selectively engagable with the housing assembly, the second
assembly configured to house exactly one surgical clip therein,
wherein the second drive assembly is different than the first drive
assembly, and wherein when the second assembly is engaged with the
housing assembly, actuation of the drive member of the housing
assembly causes actuation of the second drive assembly of the
second assembly.
3. The surgical instrument according to claim 2, wherein when the
first assembly is engaged with the housing assembly, actuation of
the drive member of the housing assembly causes actuation of the
first drive assembly of the first assembly which results in
ejection of one surgical clip of the plurality of surgical clips
when the plurality of surgical clips are housed within the first
assembly.
4. The surgical instrument according to claim 3, wherein when the
second assembly is engaged with the housing assembly, actuation of
the drive member of the housing assembly causes actuation of the
second drive assembly of the second assembly which results in
ejection of the one surgical clip when the one surgical clip is
disposed within the second assembly.
5. The surgical instrument according to claim 2, further comprising
a release lever supported on the housing of the housing assembly,
wherein the release lever includes a catch for engaging and
securing one of the first assembly or the second assembly that is
selectively engaged with the housing assembly.
6. The surgical instrument according to claim 5, wherein the catch
is configured to engage and secure the second assembly that is
selectively engaged with the housing assembly.
7. The surgical instrument according to claim 2, wherein the first
assembly includes an outer tube defining a lumen therethrough, and
wherein the first assembly includes a pair of jaws pivotably and
fixedly supported in and extending from a distal end of the outer
tube.
8. The surgical instrument according to claim 7, wherein the second
assembly includes an outer tube defining a lumen therethrough, and
wherein the second assembly includes a pair of jaws fixedly
supported in and extending from a distal end of the outer tube.
9. The surgical instrument according to claim 8, wherein the first
assembly includes an inner shaft slidably supported within the
lumen of the outer tube, the inner shaft including a proximal end
and a distal end, the distal end of the inner shaft being
operatively engaged with the pair of jaws to effectuate an opening
and a closing of the pair of jaws upon an axial translation of the
inner shaft relative to the outer tube.
10. The surgical instrument according to claim 9, wherein the
second assembly includes a spindle slidably supported in the lumen
of the outer tube, the spindle including a proximal end and a
distal end, the spindle being translatable between a proximal
position whereby the pair of jaws is opened and a distal position
whereby the pair of jaws is closed.
11. The surgical instrument according to claim 10, wherein the
first drive assembly of the first assembly includes a cartridge
cylinder defining a bore therein, a cartridge plunger slidably
supported in the bore of the cartridge cylinder, a first biasing
member disposed within the bore of the cartridge cylinder and
interposed between a proximal end wall of the cartridge cylinder
and the cartridge plunger, and a second biasing member interposed
between a proximal end of the outer tube and the cartridge
plunger.
12. The surgical instrument according to claim 11, wherein the
second drive assembly of the second assembly includes a cartridge
cylinder defining a bore therein, a cartridge plunger slidably
supported in the bore of the cartridge cylinder, a pair of opposed
fingers projecting from the cartridge cylinder, a first biasing
member disposed about the cartridge cylinder and interposed between
a proximal flange supported on the cartridge cylinder and the pair
of opposed fingers, and a second biasing member interposed between
a proximal end of the outer tube and the cartridge plunger.
13. A surgical instrument, comprising: a housing assembly including
a housing, an actuation member and a drive member, wherein
actuation of the actuation member causes actuation of the drive
member; a first assembly including a first drive assembly and an
outer tube defining a lumen therethrough, the first assembly being
selectively engagable with the housing assembly, wherein when the
first assembly is engaged with the housing assembly, actuation of
the actuation member causes actuation of the first drive assembly
of the first assembly; and a second assembly including a second
drive assembly and an outer tube defining a lumen therethrough, the
second assembly being selectively engagable with the housing
assembly, wherein the second drive assembly is different than the
first drive assembly, and wherein when the second assembly is
engaged with the housing assembly, actuation of the actuation
member causes actuation of the second drive assembly of the second
assembly.
14. The surgical instrument according to claim 13, further
comprising a release lever supported on the housing of the housing
assembly, wherein the release lever includes a catch for engaging
one of the first assembly or the second assembly that is
selectively engaged with the housing assembly.
15. The surgical instrument according to claim 13, wherein the
first assembly includes an outer tube defining a lumen
therethrough, and wherein the first assembly includes a pair of
jaws pivotably and fixedly supported in and extending from a distal
end of the outer tube.
16. The surgical instrument according to claim 15, wherein the
second assembly includes an outer tube defining a lumen
therethrough, and wherein the second assembly includes a pair of
jaws fixedly supported in and extending from a distal end of the
outer tube.
17. A surgical clip applier, comprising: a housing assembly
including a housing, an actuation member and a drive member,
wherein actuation of the actuation member causes actuation of the
drive member; a first elongated assembly including a first drive
assembly and being selectively engagable with the housing assembly,
the first elongated assembly configured to house a plurality of
surgical clips therein, wherein when the first elongated assembly
is engaged with the housing assembly, actuation of the actuation
member causes actuation of the first drive assembly of the first
elongated assembly; a second elongated assembly including a second
drive assembly and being selectively engagable with the housing
assembly, the second elongated assembly being configured to
selectively hold and form exactly one surgical clip at a time,
wherein when the second elongated assembly is engaged with the
housing assembly, actuation of the actuation member causes
actuation of the second drive assembly of the second elongated
assembly; and a release lever supported on the housing of the
housing assembly and including a catch for engaging one of the
first elongated assembly or the second elongated assembly that is
engaged with the housing assembly.
18. The surgical clip applier according to claim 17, wherein the
first elongated assembly includes an outer tube defining a lumen
therethrough, and a pair of jaws pivotably and fixedly supported in
and extending from a distal end of the outer tube.
19. The surgical clip applier according to claim 18, wherein the
second elongated assembly includes an outer tube defining a lumen
therethrough, and a pair of jaws fixedly supported in and extending
from a distal end of the outer tube.
20. The surgical clip applier according to claim 19, wherein the
first elongated assembly includes an inner shaft slidably supported
within the lumen of the outer tube, the inner shaft including a
proximal end and a distal end, the distal end of the inner shaft
being operatively engaged with the pair of jaws to effectuate
opening and closing of the pair of jaws upon an axial translation
of the inner shaft relative to the outer tube.
21. The surgical clip applier according to claim 20, wherein the
second elongated assembly includes a spindle slidably supported in
the lumen of the outer tube, the spindle including a proximal end
and a distal end, the spindle being translatable between a proximal
position whereby the pair of jaws is opened and a distal position
whereby the pair of jaws is closed.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of U.S. patent
application Ser. No. 16/507,246, filed Jul. 10, 2019, which is a
continuation of U.S. patent application Ser. No. 15/341,292, filed
Nov. 2, 2016, now U.S. Pat. No. 10,390,831, which claims the
benefit of and priority to U.S. Provisional Patent Application Ser.
No. 62/253,162, filed on Nov. 10, 2015, the entire disclosures of
which are incorporated by reference herein.
BACKGROUND
[0002] The technical field relates to surgical clip appliers. More
particularly, the present disclosure relates to endoscopic
reposable surgical clip appliers having a reusable handle assembly,
at least one reusable shaft assembly, and at least one disposable
clip cartridge assembly.
[0003] Endoscopic surgical staplers and surgical clip appliers are
known in the art and are used for a number of distinct and useful
surgical procedures. In the case of a laparoscopic surgical
procedure, access to the interior of an abdomen is achieved through
narrow tubes or cannulas inserted through a small entrance incision
in the skin. Minimally invasive procedures performed elsewhere in
the body are often generally referred to as endoscopic procedures.
Typically, a tube or cannula device is extended into the patient's
body through the entrance incision to provide an access port. The
port allows the surgeon to insert a number of different surgical
instruments therethrough using a trocar and for performing surgical
procedures far removed from the incision.
[0004] During a majority of these procedures, the surgeon must
often terminate the flow of blood or another fluid through one or
more vessels. The surgeon will often use a particular endoscopic
surgical clip applier to apply a surgical clip to a blood vessel or
another duct to prevent the flow of body fluids therethrough during
the procedure.
[0005] Endoscopic surgical clip appliers having various sizes
(e.g., diameters), that are configured to apply a variety of
diverse surgical clips, are known in the art, and which are capable
of applying a single or multiple surgical clips during an entry to
the body cavity. Such surgical clips are typically fabricated from
a biocompatible material and are usually compressed over a vessel.
Once applied to the vessel, the compressed surgical clip terminates
the flow of fluid therethrough.
[0006] Endoscopic surgical clip appliers that are able to apply
multiple clips in endoscopic or laparoscopic procedures during a
single entry into the body cavity are described in
commonly-assigned U.S. Pat. Nos. 5,084,057 and 5,100,420 to Green
et al., which are both incorporated by reference in their entirety.
Another multiple endoscopic surgical clip applier is disclosed in
commonly-assigned U.S. Pat. No. 5,607,436 by Pratt et al., the
contents of which is also hereby incorporated by reference herein
in its entirety. These devices are typically, though not
necessarily, used during a single surgical procedure. U.S. Pat. No.
5,695,502 to Pier et al., the disclosure of which is hereby
incorporated by reference herein, discloses a resterilizable
endoscopic surgical clip applier. The endoscopic surgical clip
applier advances and forms multiple clips during a single insertion
into the body cavity. This resterilizable endoscopic surgical clip
applier is configured to receive and cooperate with an
interchangeable clip magazine so as to advance and form multiple
clips during a single entry into a body cavity.
[0007] During endoscopic or laparoscopic procedures it may be
desirable and/or necessary to use different size surgical clips or
different configured surgical clips depending on the underlying
tissue or vessels to be ligated. In order to reduce overall costs
of an endoscopic surgical clip applier, it is desirable for a
single endoscopic surgical clip applier to be loadable with and
capable of firing different size surgical clips as needed.
[0008] Accordingly, a need exists for endoscopic surgical clip
appliers that include reusable handle assemblies, reusable shaft
assemblies, and disposable clip cartridge assemblies, with each
clip cartridge assembly being loaded with a particularly sized clip
(e.g., relatively small, relatively medium, or relatively
large).
SUMMARY
[0009] The present disclosure relates to reposable endoscopic
surgical clip appliers.
[0010] According to an aspect of the present disclosure, a
reposable surgical clip applier is provided. The reposable surgical
clip applier includes a handle assembly having a housing defining a
bore therein and which extends through a distal end thereof; a
fixed handle extending from the housing; a trigger pivotally
connected to the fixed handle, the trigger including an actuating
end disposed within the bore of the housing; and a drive plunger
slidably supported within the bore of the housing and axially
aligned with the bore of the housing, the drive plunger having a
proximal end operatively engaged by the actuating end of the
trigger, and a free distal end.
[0011] According to an embodiment, the reposable surgical clip
applier includes a first endoscopic assembly selectively
connectable to the housing of the handle assembly. The first
endoscopic assembly includes a shaft assembly having an outer tube
defining a lumen therethrough, the outer tube including a proximal
end and a distal end; a pair of jaws pivotably and fixedly
supported in, and extending from the distal end of the outer tube;
and an inner shaft slidably supported within the lumen of the outer
tube, the inner shaft including a proximal end and a distal end,
the distal end of the inner shaft being operatively engaged with
the pair of jaws to effectuate an opening and a closing of the pair
of jaws upon an axial translation of the inner shaft relative to
the outer tube.
[0012] The first endoscopic assembly further includes a hub
assembly configured for selective insertion in the bore of the
housing of the handle assembly. The hub assembly includes an outer
housing supported on the proximal end of the outer tube, the outer
housing defining an open proximal end; and a drive assembly
supported within the outer housing of the hub assembly.
[0013] The drive assembly includes a cartridge cylinder slidably
supported in the outer housing of the hub assembly, the cartridge
cylinder including a proximal end wall, an open distal end, and a
bore therein; a cartridge plunger supported on the proximal end of
the inner shaft of the shaft assembly, the cartridge plunger being
slidably supported in the bore of the cartridge cylinder; a first
biasing member disposed within the bore of the cartridge cylinder,
and being interposed between the proximal end wall of the cartridge
cylinder and the cartridge plunger; and a second biasing member
interposed between a proximal end of the outer tube of the shaft
assembly and the cartridge plunger.
[0014] The first biasing member of the first endoscopic assembly
may be a coil spring having a first spring constant. The second
biasing member of the first endoscopic assembly may be a coil
spring having a second spring constant, wherein the second spring
constant is less than the first spring constant.
[0015] In operation, during an actuation of the trigger, with the
first endoscopic assembly connected to the handle assembly, the
trigger may distally advance the drive plunger against the proximal
end wall of the cartridge cylinder of the first endoscopic assembly
to distally advance the cartridge cylinder. The proximal end wall
of the cartridge cylinder may act on the first basing member to
distally advance the first biasing member. The first biasing member
may act on the cartridge plunger to distally advance the cartridge
plunger and the inner shaft of the first endoscopic assembly. The
cartridge plunger may act on the second biasing member to bias the
second biasing member.
[0016] The second biasing member may be biased until the inner
shaft of the first endoscopic assembly is stopped from distal
advancement.
[0017] In operation, when the inner shaft of the first endoscopic
assembly is stopped from distal advancement, further actuation of
the trigger further may distally advance the drive plunger of the
handle assembly against the proximal end wall of the cartridge
cylinder of the first endoscopic assembly to further distally
advance the cartridge cylinder. The proximal end wall of the
cartridge cylinder may act on the first basing member to bias the
first biasing member.
[0018] According to another embodiment, the reposable surgical clip
applier includes a second endoscopic assembly selectively
connectable to the housing of the handle assembly. The second
endoscopic assembly includes a shaft assembly having an outer tube
defining a lumen therethrough, the outer tube including a proximal
end and a distal end; a pair of jaws fixedly supported in and
extending from the distal end of the outer tube; an elongate
spindle slidably supported in the lumen of the outer tube, the
spindle including a proximal end and a distal end, the spindle
being translatable between a proximal position whereby the pair of
jaws are opened and a distal position whereby the pair of jaws are
caused to be closed by the spindle; and an inner shaft slidably
receivable within the lumen of the outer tube, the inner shaft
including a proximal end and a distal end, the distal end of the
inner shaft being operatively engaged the proximal end of the
spindle to effectuate a translation of the spindle between the
proximal and distal positions thereof.
[0019] The second endoscopic assembly further includes a hub
assembly configured for selective insertion in the bore of the
housing of the handle assembly. The hub assembly includes an outer
housing supported on the proximal end of the outer tube, the outer
housing defining an open proximal end; and a drive assembly
supported within the outer housing of the hub assembly.
[0020] The drive assembly includes a cartridge cylinder slidably
supported in the outer housing of the hub assembly, the cartridge
cylinder including a cylindrical body, a proximal end wall, an open
distal end, and a bore therein; and a cartridge plunger slidably
supported in the bore of the cartridge cylinder. The cartridge
plunger includes a stem connected to the proximal end of the inner
shaft of the shaft assembly; and a pair of opposed fingers
supported on the stem and extending through respective
longitudinally extending slots formed in the cylindrical body of
the cartridge cylinder, wherein the pair of opposed fingers project
from the cartridge cylinder.
[0021] The drive assembly of the second endoscopic assembly further
includes a first biasing member disposed about the cartridge
cylinder, and being interposed between a proximal flange supported
on the cartridge cylinder and the pair of opposed fingers of the
cartridge plunger; and a second biasing member supported on the
stem of the cartridge plunger, and being interposed between the
cartridge plunger and a proximal end of the outer tube of the shaft
assembly.
[0022] The second endoscopic assembly may further include a wedge
plate disposed adjacent the spindle and slidably translatable
relative to the spindle, wherein a distal end of the wedge plate is
interposed between a distal end of the spindle and the pair of
jaws; a filler component disposed adjacent the wedge plate and
proximal of the pair of jaws; a clip channel disposed adjacent the
filler component and adjacent the pair of jaws; a plurality of
surgical clip loaded within the clip channel and slidably disposed
therein; a clip follower disposed within the clip channel at a
location proximal of the plurality of clips, the clip follower
being biased distally; a clip channel cover disposed adjacent the
clip channel; and a pusher bar disposed adjacent the clip channel
cover and slidably translatable relative to the pair of jaws,
wherein a distal end of the pusher bar is configured to distally
advance a distal-most surgical clip of the plurality of surgical
clips between the pair of jaws.
[0023] The handle assembly may further include a ratchet assembly.
The ratchet assembly may include a ratchet rack defining a length
of rack teeth and having a proximal end and a distal end; and a
pawl operatively engagable with the rack teeth of the ratchet rack,
wherein the pawl prohibits reversal of a direction of the trigger
once the tooth of the pawl engages the rack teeth of the ratchet
rack, until the tooth of the pawl is disposed beyond the proximal
end or the distal end of the ratchet rack.
[0024] In operation, when the inner shaft of the first endoscopic
assembly is stopped from distal advancement, and when the tooth of
the pawl is still engaged with the rack teeth of the ratchet rack,
further actuation of the trigger may further advance the rack teeth
of the ratchet rack until the rack teeth of the ratchet rack clears
the tooth of the pawl.
[0025] The handle assembly may further include a release lever
supported on the housing thereof. The release lever may include a
first end operatively associated with the pawl switch, wherein
actuation of the release lever, upon a connection of the first
endoscopic assembly to the handle assembly, moves the first end
thereof into engagement with the pawl switch to move the pawl
switch to the un-actuated position. The release lever may include a
second end defining a catch configured to selectively engage a lip
of the outer housing of the first endoscopic assembly when the
first endoscopic assembly is connected to the handle assembly.
[0026] The release lever may be actuated upon a connection of the
first endoscopic assembly to the handle assembly, whereby the first
end of the release lever may engage the pawl switch to move the
pawl switch to the un-actuated position.
[0027] In operation, during an actuation of the trigger, with the
second endoscopic assembly connected to the handle assembly, the
trigger may distally advance the drive plunger against the proximal
end wall of the cartridge cylinder of the second endoscopic
assembly to distally advance the cartridge cylinder. The flange of
the cartridge cylinder may act on the first basing member to
distally advance the first biasing member. The first biasing member
may act on the pair of opposed fingers of the cartridge plunger to
distally advance the cartridge plunger and the inner shaft of the
second endoscopic assembly. The cartridge plunger may act on the
second biasing member to bias the second biasing member.
[0028] The second biasing member may be biased until the inner
shaft of the second endoscopic assembly is stopped from distal
advancement.
[0029] In operation, when the inner shaft of the second endoscopic
assembly is stopped from distal advancement, further actuation of
the trigger may further distally advance the drive plunger of the
handle assembly against the proximal end wall of the cartridge
cylinder of the second endoscopic assembly to further distally
advance the cartridge cylinder. The flange of the cartridge
cylinder may act on the first basing member to bias the first
biasing member.
[0030] In operation, when the inner shaft of the second endoscopic
assembly is stopped from distal advancement, and when the tooth of
the pawl is still engaged with the rack teeth of the ratchet rack,
further actuation of the trigger may further advance the rack teeth
of the ratchet rack until the rack teeth of the ratchet rack clears
the tooth of the pawl.
[0031] The release lever may be actuated upon a connection of the
second endoscopic assembly to the handle assembly, whereby the
first end of the release lever engages the pawl switch to move the
pawl switch to the un-actuated position.
[0032] According to another aspect of the present disclosure, a
handle assembly for a surgical instrument is provided. The handle
assembly includes a housing defining a bore therein and which
extends through a distal end thereof, the bore having an open
distal end configured to selectively receive an endoscopic assembly
therein; a fixed handle extending from the housing; a trigger
pivotally connected to the fixed handle, the trigger including an
actuating end disposed within the bore of the housing; a drive
plunger slidably supported within the bore of the housing and
axially aligned with the bore of the housing, the drive plunger
having a proximal end operatively engaged by the actuating end of
the trigger, and a free distal end; and a ratchet assembly
supported in the housing.
[0033] The ratchet assembly includes a ratchet rack defining a
length of rack teeth and having a proximal end and a distal end;
and a pawl operatively engagable with the rack teeth of the ratchet
rack, wherein the pawl prohibits reversal of a direction of the
trigger once the tooth of the pawl engages the rack teeth of the
ratchet rack, until the tooth of the pawl is disposed beyond the
proximal end or the distal end of the ratchet rack.
[0034] The handle assembly further includes a pawl switch supported
on the housing, the pawl switch being operatively associated with
the ratchet assembly, wherein the pawl switch includes an actuated
position wherein the pawl switch acts on the pawl to disengage the
pawl from the ratchet rack.
[0035] The pawl switch of the handle assembly may include an
un-actuated position wherein the pawl is in operative association
with the ratchet rack.
[0036] The pawl switch may default to the un-actuated position upon
a coupling of the first endoscopic assembly to the handle
assembly.
[0037] The handle assembly may further include a release lever
supported on the housing thereof. The release lever may include a
first end operatively associated with the pawl switch, wherein
actuation of the release lever, upon a connection of the endoscopic
assembly to the handle assembly, moves the first end thereof into
engagement with the pawl switch to move the pawl switch to the
un-actuated position. The release lever may include a second end
defining a catch configured to selectively engage a lip of the
outer housing of the endoscopic assembly when the endoscopic
assembly is connected to the handle assembly.
[0038] The release lever may be actuated upon a connection of the
endoscopic assembly to the handle assembly, whereby the first end
of the release lever engages the pawl switch to move the pawl
switch to the un-actuated position.
[0039] According to yet aspect of the present disclosure, an
endoscopic assembly configured for selective connection to an
actuation assembly, is provided. The endoscopic assembly includes a
shaft assembly having an outer tube defining a lumen therethrough,
the outer tube including a proximal end and a distal end; a pair of
jaws pivotably and fixedly supported in, and extending from the
distal end of the outer tube; and an inner shaft slidably supported
within the lumen of the outer tube, the inner shaft including a
proximal end and a distal end, the distal end of the inner shaft
being operatively engaged with the pair of jaws to effectuate an
opening and a closing of the pair of jaws upon an axial translation
of the inner shaft relative to the outer tube.
[0040] The endoscopic assembly further includes a hub assembly
configured for selective connection to the actuation assembly. The
hub assembly includes an outer housing supported on the proximal
end of the outer tube, the outer housing defining an open proximal
end; and a drive assembly supported within the outer housing of the
hub assembly.
[0041] The drive assembly includes a cartridge cylinder slidably
supported in the outer housing of the hub assembly, the cartridge
cylinder including a proximal end wall, an open distal end, and a
bore therein; a cartridge plunger supported on the proximal end of
the inner shaft of the shaft assembly, the cartridge plunger being
slidably supported in the bore of the cartridge cylinder; a first
biasing member disposed within the bore of the cartridge cylinder,
and being interposed between the proximal end wall of the cartridge
cylinder and the cartridge plunger; and a second biasing member
interposed between a proximal end of the outer tube of the shaft
assembly and the cartridge plunger.
[0042] The first biasing member may be a coil spring having a first
spring constant. The second biasing member may be a coil spring
having a second spring constant. The second spring constant may be
less than the first spring constant.
[0043] In operation, during an actuation of the actuation assembly,
with the endoscopic assembly connected to the actuation assembly,
the actuation assembly may act on the proximal end wall of the
cartridge cylinder to distally advance the cartridge cylinder. The
proximal end wall of the cartridge cylinder may act on the first
basing member to distally advance the first biasing member. The
first biasing member may act on the cartridge plunger to distally
advance the cartridge plunger and the inner shaft thereof. The
cartridge plunger may act on the second biasing member to bias the
second biasing member.
[0044] According to still another aspect of the present disclosure,
an endoscopic assembly, configured for selective connection to an
actuation assembly, is provided. The endoscopic assembly includes a
shaft assembly having an outer tube defining a lumen therethrough,
the outer tube including a proximal end and a distal end; a pair of
jaws fixedly supported in and extending from the distal end of the
outer tube; an elongate spindle slidably supported in the lumen of
the outer tube, the spindle including a proximal end and a distal
end, the spindle being translatable between a proximal position
whereby the pair of jaws are opened and a distal position whereby
the pair of jaws are caused to be closed by the spindle; and an
inner shaft slidably receivable within the lumen of the outer tube,
the inner shaft including a proximal end and a distal end, the
distal end of the inner shaft being operatively engaged the
proximal end of the spindle to effectuate a translation of the
spindle between the proximal and distal positions thereof.
[0045] The endoscopic assembly further includes a hub assembly
configured for selective connection to the actuation assembly. The
hub assembly includes an outer housing supported on the proximal
end of the outer tube, the outer housing defining an open proximal
end; and a drive assembly supported within the outer housing of the
hub assembly.
[0046] The drive assembly includes a cartridge cylinder slidably
supported in the outer housing of the hub assembly, the cartridge
cylinder including a cylindrical body, a proximal end wall, an open
distal end, and a bore therein; and a cartridge plunger slidably
supported in the bore of the cartridge cylinder. The cartridge
plunger includes a stem connected to the proximal end of the inner
shaft of the shaft assembly; and a pair of opposed fingers
supported on the stem and extending through respective
longitudinally extending slots formed in the cylindrical body of
the cartridge cylinder, wherein the pair of opposed fingers project
from the cartridge cylinder;
[0047] The drive assembly further includes a first biasing member
disposed about the cartridge cylinder, and being interposed between
a proximal flange supported on the cartridge cylinder and the pair
of opposed fingers of the cartridge plunger; and a second biasing
member supported on the stem of the cartridge plunger, and being
interposed between the cartridge plunger and a proximal end of the
outer tube of the shaft assembly.
[0048] The first biasing member may be a coil spring having a first
spring constant. The second biasing member may be a coil spring
having a second spring constant. The second spring constant may be
less than the first spring constant.
[0049] In operation, during an actuation of the actuation assembly,
with the endoscopic assembly connected to the actuation assembly,
the actuation assembly may act on the proximal end wall of the
cartridge cylinder to distally advance the cartridge cylinder. The
flange of the cartridge cylinder may act on the first basing member
to distally advance the first biasing member. The first biasing
member may act on the pair of opposed fingers of the cartridge
plunger to distally advance the cartridge plunger and the inner
shaft. The cartridge plunger may act on the second biasing member
to bias the second biasing member.
[0050] The second biasing member may be biased until the inner
shaft thereof is stopped from distal advancement.
[0051] In an operation of the endoscopic assembly, when the inner
shaft thereof is stopped from distal advancement, further actuation
of the actuation assembly may distally advance the cartridge
cylinder. The proximal end wall of the cartridge cylinder may act
on the first basing member to bias the first biasing member.
[0052] The endoscopic assembly may further include a wedge plate
disposed adjacent the spindle and slidably translatable relative to
the spindle, wherein a distal end of the wedge plate is interposed
between a distal end of the spindle and the pair of jaws; a filler
component disposed adjacent the wedge plate and proximal of the
pair of jaws; a clip channel disposed adjacent the filler component
and adjacent the pair of jaws; a plurality of surgical clip loaded
within the clip channel and slidably disposed therein; a clip
follower disposed within the clip channel at a location proximal of
the plurality of clips, the clip follower being biased distally; a
clip channel cover disposed adjacent the clip channel; and a pusher
bar disposed adjacent the clip channel cover and slidably
translatable relative to the pair of jaws, wherein a distal end of
the pusher bar is configured to distally advance a distal-most
surgical clip of the plurality of surgical clips between the pair
of jaws.
[0053] According to another aspect of the present disclosure, a
reposable surgical clip applier is provided. The reposable surgical
clip applier includes a handle assembly configured to actuate at
least a first endoscopic assembly or a second endoscopic assembly.
The handle assembly includes a housing defining a bore therein and
which extends through a distal end thereof; a trigger pivotally
connected to the housing, the trigger including an actuating end
disposed within the bore of the housing; and a drive plunger
slidably supported within the bore of the housing and axially
aligned with the bore of the housing, the drive plunger having a
proximal end operatively engaged by the actuating end of the
trigger, and a free distal end, the drive plunger having a stroke
length.
[0054] The reposable surgical clip applier further includes a first
endoscopic assembly selectively connectable to the housing of the
handle assembly. The first endoscopic assembly includes a shaft
assembly having a pair of jaws pivotally supported on a distal end
of an outer tube; an inner shaft slidably supported within a lumen
of the outer tube, the inner shaft including a proximal end and a
distal end, the distal end of the inner shaft being operatively
engaged with the pair of jaws to effectuate an opening and a
closing of the pair of jaws upon an axial translation of the inner
shaft relative to the outer tube; and a hub assembly configured for
selective insertion in the bore of the housing of the handle
assembly.
[0055] The hub assembly of the first endoscopic assembly includes a
first biasing member having a first spring constant; and a second
biasing member having a second spring constant, wherein the second
spring constant is less than the first spring constant.
[0056] The first endoscopic assembly has a stroke length defined by
a distance to move the inner shaft to move the pair of jaws from a
fully open position to a fully closed position;
[0057] The reposable surgical clip applier additionally includes a
second endoscopic assembly selectively connectable to the housing
of the handle assembly. The second endoscopic assembly includes a
shaft assembly having a pair of jaws fixedly supported on a distal
end of an outer tube; an elongate spindle slidably supported in a
lumen of the outer tube, the spindle including a proximal end and a
distal end, the spindle being translatable between a proximal
position whereby the pair of jaws are fully opened and a distal
position whereby the pair of jaws are caused to be fully closed by
the spindle; an inner shaft slidably receivable within the lumen of
the outer tube, the inner shaft including a proximal end and a
distal end, the distal end of the inner shaft being operatively
engaged the proximal end of the spindle to effectuate a translation
of the spindle between the proximal and distal positions thereof;
and a hub assembly configured for selective insertion in the bore
of the housing of the handle assembly.
[0058] The hub assembly of the second endoscopic assembly includes
a first biasing member having a first spring constant; and a second
biasing member having a second spring constant, wherein the second
spring constant is less than the first spring constant.
[0059] The second endoscopic assembly has a stroke length defined
by a distance to move the spindle to move the pair of jaws from the
fully open position to the fully closed position.
[0060] The stroke length of the first endoscopic assembly is
different than the stroke length of the second endoscopic
assembly.
BRIEF DESCRIPTION OF THE DRAWINGS
[0061] A particular embodiment of a surgical clip applier is
disclosed herein with reference to the drawings wherein:
[0062] FIG. 1 is a perspective view of a reposable endoscopic
surgical clip applier, according to the present disclosure
including a reusable handle assembly, and a first endoscopic
assembly and a second endoscopic assembly each selectively
connectable to the handle assembly;
[0063] FIG. 2 is perspective view of the reposable endoscopic
surgical clip applier including the reusable handle assembly and
the first endoscopic assembly connected thereto;
[0064] FIG. 3 is a perspective view of the handle assembly with at
least a housing half-section removed therefrom;
[0065] FIG. 4 is a perspective view, with parts separated, of the
handle assembly of FIGS. 1-3;
[0066] FIG. 5 is an enlarged perspective view of the indicated area
of detail of FIG. 4, illustrating a pawl switch and a pawl actuator
of the handle assembly of FIG. 1;
[0067] FIG. 6 is a further perspective view of the pawl switch of
FIG. 5;
[0068] FIG. 7 is a further perspective view of the pawl actuator of
FIG. 5;
[0069] FIGS. 8-9 are various perspective views of the pawl switch
and the pawl actuator of the handle assembly, shown in operation
with the pawl switch in an un-actuated condition and the pawl
actuator engaged with a pawl of a ratchet assembly;
[0070] FIG. 10 is a top plan view of the pawl switch and the pawl
actuator of the handle assembly, shown in operation with the pawl
switch in the un-actuated condition and the pawl actuator engaged
from the pawl of the ratchet assembly;
[0071] FIG. 11 is a transverse, cross-sectional view of the handle
assembly of FIG. 1 as taken through 11-11 of FIG. 1, illustrating
the pawl switch in an actuated condition;
[0072] FIGS. 12-13 are various perspective views of the pawl switch
and the pawl actuator of the handle assembly, shown in operation
with the pawl switch in the actuated condition and the pawl
actuator disengaged from the pawl of the ratchet assembly;
[0073] FIG. 14 is a top plan view of the pawl switch and the pawl
actuator of the handle assembly, shown in operation with the pawl
switch in the actuated condition and the pawl actuator disengaged
from the pawl of the ratchet assembly;
[0074] FIG. 15 is a perspective view, with parts separated, of the
first endoscopic assembly of FIG. 1;
[0075] FIG. 16 is a top, plan view of the first endoscopic assembly
of FIGS. 1 and 15;
[0076] FIG. 17 is a transverse, cross-sectional view of the first
endoscopic assembly of FIGS. 1 and 15-16, as taken through 17-17 of
FIG. 16;
[0077] FIG. 18 is a perspective view illustrating an initial
connection of the handle assembly and the first endoscopic
assembly;
[0078] FIG. 19 is a longitudinal, transverse cross-sectional view
illustrating the initial connection of the handle assembly and the
first endoscopic assembly;
[0079] FIG. 20 is an enlarged view of the indicated area of detail
of FIG. 19;
[0080] FIG. 21 is a longitudinal, transverse cross-sectional view
illustrating a complete connection of the handle assembly and the
first endoscopic assembly;
[0081] FIG. 22 is an enlarged view of the indicated area of detail
of FIG. 21;
[0082] FIG. 23 is a longitudinal, transverse cross-sectional view
illustrating an initial actuation of the handle assembly with the
first endoscopic assembly connected thereto;
[0083] FIG. 24 is an enlarged view of the indicated area of detail
of FIG. 23;
[0084] FIG. 25 is a longitudinal, transverse cross-sectional view
illustrating a complete actuation of the handle assembly with the
first endoscopic assembly connected thereto;
[0085] FIG. 26 is perspective view of the reposable endoscopic
surgical clip applier including the reusable handle assembly and
the second endoscopic assembly connected thereto;
[0086] FIG. 27 is a perspective view, with parts separated, of the
second endoscopic assembly of FIGS. 1 and 26;
[0087] FIG. 28 is a perspective view, with parts separated, of a
shaft assembly of the second endoscopic assembly;
[0088] FIG. 29 is a perspective view of the distal end of the shaft
assembly of the second endoscopic assembly with an outer tube
removed therefrom;
[0089] FIG. 30 is an enlarged view of the indicated area of detail
of FIG. 29;
[0090] FIG. 31 is an enlarged view of the indicated area of detail
of FIG. 29;
[0091] FIG. 32 is a perspective view of the distal end of the shaft
assembly of the second endoscopic assembly with the outer tube and
a pusher bar removed therefrom;
[0092] FIG. 33 is an enlarged view of the indicated area of detail
of FIG. 32;
[0093] FIG. 34 is an enlarged view of the indicated area of detail
of FIG. 32;
[0094] FIG. 35 is a perspective view of the distal end of the shaft
assembly of the second endoscopic assembly with the outer tube, the
pusher bar and a clip channel removed therefrom;
[0095] FIG. 36 is an enlarged view of the indicated area of detail
of FIG. 35;
[0096] FIG. 37 is an enlarged view of the indicated area of detail
of FIG. 35;
[0097] FIG. 38 is a perspective view of the distal end of the shaft
assembly of the second endoscopic assembly with the outer tube, the
pusher bar, the clip channel and a pair of jaws and a filler
component removed therefrom;
[0098] FIG. 39 is a perspective view of the distal end of the shaft
assembly of the second endoscopic assembly with the outer tube, the
pusher bar, the clip channel, the pair of jaws, the filler
component, and a wedge plate removed therefrom;
[0099] FIG. 40 is a longitudinal, transverse cross-sectional view
illustrating a complete connection of the handle assembly and the
second endoscopic assembly, prior to actuation of a trigger of the
handle assembly;
[0100] FIG. 41 is a longitudinal, transverse cross-sectional view
illustrating a complete actuation of the handle assembly with the
second endoscopic assembly connected thereto; and
[0101] FIG. 42 is a schematic illustration of a robotic surgical
system configured for use in accordance with the present
disclosure.
DETAILED DESCRIPTION OF EMBODIMENTS
[0102] Embodiments of reposable endoscopic surgical clip appliers,
in accordance with the present disclosure, will now be described in
detail with reference to the drawing figures wherein like reference
numerals identify similar or identical structural elements. As
shown in the drawings and described throughout the following
description, as is traditional when referring to relative
positioning on a surgical instrument, the term "proximal" refers to
the end of the apparatus which is closer to the user and the term
"distal" refers to the end of the apparatus which is further away
from the user.
[0103] Referring now to FIGS. 1-29, an endoscopic surgical clip
applier in accordance with an embodiment of the present disclosure,
and assembly in a particular configuration, is generally designated
as 10. Surgical clip applier 10 generally includes a reusable
handle assembly or actuation assembly 100, at least one disposable
or reusable endoscopic assembly 200 selectively connectable to and
extendable distally from handle assembly 100; and optionally at
least one disposable surgical clip cartridge assembly (not shown)
selectively loadable into a shaft assembly of a respective
endoscopic assembly 200.
[0104] Briefly, the shaft assembly of endoscopic assembly 200 may
have various outer diameters such as, for example, about 5 mm or
about 10 mm, depending on intended use. Further, the shaft assembly
may have various relatively elongated or shortened lengths
depending on intended use, such as, for example, in bariatric
surgery. In one embodiment, in bariatric surgery, the shaft
assembly may have a length of between about 30 cm and about 40 cm.
Further, the shaft assembly may be configured to fire and form a
specific type of surgical clip, either individually or multiply.
However one skilled in the art should appreciate that the shaft
assembly may have any length in excess of about 30 cm and the
present disclosure is not limited to any of the above identified
lengths.
[0105] In accordance with the present disclosure, as will be
discussed in greater detail below, an endoscopic assembly or a
surgical clip cartridge assembly (not shown) may be loaded with a
particularly sized set of surgical clips (e.g., relatively small
surgical clips, relatively medium surgical clips, or relatively
large surgical clips). It is contemplated that clip cartridge
assemblies may be configured to be selectively loaded into the
shaft assembly of a respective endoscopic assembly 200, and to be
actuated by the same or common handle assembly 100, to fire and
form the surgical clip(s) loaded therein onto underlying tissue
and/or vessels.
[0106] Referring now to FIGS. 1-14, handle assembly 100 of surgical
clip applier 10 is shown and will be described. Handle assembly 100
includes a housing 102 having a first or right side half-section
102a and a second or left side half-section 102b. Housing 102 of
handle assembly 100 further includes or defines, as seen in FIGS. 3
and 4, a nose 102c. Housing 102 of handle assembly 100 may be
formed of a suitable plastic or thermoplastic material. It is
further contemplated that housing 102 of handle assembly 100 may be
fabricated from stainless steel of the like.
[0107] Handle assembly 100 includes a trigger 104 pivotably
supported between right side half-section 102a and left side
half-section 102b of housing 102. Trigger 104 is biased by a
biasing member 104a (e.g., a return spring, compression spring or
torsion spring) to an un-actuated condition. Specifically, biasing
member 104a (FIG. 4) acts on a feature of trigger 104 and on a
feature of housing 102 to bias or urge trigger 104 to the
un-actuated condition. Trigger 104 includes a drive arm 104b
extending therefrom. Drive arm 104b may be integrally formed
therewith or may be separately and fixedly secured to trigger 104.
Drive arm 104b may define a curved, radiused or filleted upper
distal surface.
[0108] As illustrated in FIGS. 3, 4 and 8-14, trigger 104 supports
or is provided with at least one linear rack 152 of teeth 152a of a
ratchet assembly 150, as will be described in detail below.
[0109] With reference to FIGS. 3, 4, 11, handle assembly 100
includes a drive plunger 120 operatively connected to trigger 104.
Specifically, drive plunger 120 is slidably supported within
housing 102 and defines a pair of opposed, axially extending slots
120a formed in an outer surface thereof. Slots 120a of drive
plunger 120 are configured to slidably engage or receive opposed
tabs 102d of housing 102. Drive plunger 120 further defines a
proximally extending trigger slot 120b formed in a proximal portion
thereof for operatively receiving drive arm 104b of trigger 104.
Trigger slot 120b defines a distal surface or wall 120c against
which a distal surface of drive arm 104b of trigger 104 contacts in
order to distally advance drive plunger 120 during an actuation of
trigger 104.
[0110] Drive plunger 120 further includes a tooth 120d (FIG. 11)
projecting into trigger slot 120b. Tooth 120d projects
substantially toward trigger 104 and includes a distal surface or
wall 120d1 (spaced proximally from distal surface or wall 120c of
drive plunder 120), and a proximal, angled wall 120d2 tapering to a
relatively smaller height in a proximal direction.
[0111] Drive plunger 120 additionally includes a tab or fin 120e
projecting from a surface thereof. Tab 120e of drive plunger 120
may be substantially aligned or in registration with tooth 120d of
drive plunger 120. Tab 120e of drive plunger 120 may project in a
direction substantially opposite to tooth 120d of drive plunger 120
or to trigger 104.
[0112] With reference to FIGS. 1-4 and 11, handle assembly 100
includes an endoscopic assembly release lever 130 pivotally
supported on and connected to housing 102 via a pivot pin 132.
Pivot pin 132 is supported in housing 102. Release lever 130
includes a proximal end 130a extending proximally of pivot pin 132.
Proximal end 130a of release lever 130 includes a wall 130c
dimensioned to extend toward a pawl switch 140 of handle assembly
100, as will be described in greater detail below.
[0113] Release lever 130 includes a distal end 130b extending
distally of pivot pin 132. Distal end 130b of release lever 130
includes a catch or tooth 130d projecting therefrom, in a direction
towards drive plunger 120. Catch 130d may be located distal of
drive plunger 120.
[0114] A biasing member 134, in the form of a leaf spring, may be
provided which tends to bias distal end 130b and catch 130d of
release lever 130 towards drive plunger 120 of handle assembly 100,
and tends to bias proximal end 130a of release lever 130 away from
pawl switch 140. Specifically, biasing member 134 tends to maintain
catch 130d of release lever 130 in engagement with an engagement
feature (e.g., annular channel 212c) of endoscopic assembly 200, as
will be described in greater detail below.
[0115] With reference to FIGS. 3, 4 and 11-14, as mentioned above,
handle assembly 100 includes a ratchet assembly 150 supported
within housing 102. Ratchet assembly 150 includes, as also
mentioned above, at least one linear rack 152 of teeth 152a
supported on and projecting from trigger 104. Ratchet assembly 150
further includes a ratchet pawl 154 pivotally connected to housing
102 by a pawl pin at a location wherein pawl 154 is in substantial
operative engagement with rack 152. Ratchet assembly 150 further
includes a pawl spring 156 configured and positioned to bias pawl
154 into operative engagement with rack 152. Pawl spring 156
functions to maintain the tooth or teeth 154a of pawl 154 in
engagement with teeth 152a of rack 152, as well as to maintain pawl
154 in a rotated or canted position.
[0116] Pawl 154 is engagable with rack 152 to restrict longitudinal
movement of rack 152 and, in turn, trigger 104. In use, as trigger
104 is actuated (from a fully un-actuated position), rack 152 is
also moved, into engagement with pawl 154. Rack 152 has a length
which allows pawl 154 to reverse and advance back over rack 152,
when rack 152 changes between proximal or distal movement, as
trigger 104 reaches a fully actuated or fully un-actuated position.
The relative lengths and sizes of rack 152 of ratchet assembly 150,
trigger 104 and drive plunger 120 define a stroke length of trigger
104, drive plunger 120 or handle assembly 100 (e.g., a "full
stroke").
[0117] Turning now to FIGS. 1, 2, 4, 11 and 18, handle assembly 100
includes a rotation knob 160 rotatably supported on nose 102c of
housing 102. Rotation knob 160 includes a central axial bore 160a
having an annular array of longitudinally extending grooves 160b
(FIG. 18) formed in a surface thereof. Grooves 160b of rotation
knob 160 function as clocking and alignment features for the
connection of endoscopic assembly 200 with handle assembly 100.
Rotation knob 160 further includes a plurality of finger grip ribs
160c projecting from an outer surface thereof.
[0118] With reference to FIGS. 3 and 4-14, handle assembly 100
further includes a pawl switch 140 and a pawl actuator 142 each
pivotally supported in housing 102. Pawl switch 140 is operatively
connected to pawl actuator 142 and is operable to selectively move
pawl actuator 142 into or out of engagement with pawl spring 156,
and in turn pawl 154, of ratchet assembly 150 whereby pawl 154 may
be selectively engaged by pawl spring 156. In this manner, when
pawl 154 is moved out of engagement with pawl spring 156, trigger
104 is free to open and close as needed due to pawl 154 having
minimal blocking effect on rack 152 of ratchet assembly 150. As
such, trigger 104 may be partially actuated (without having to be
fully actuated), and may be returnable to a fully un-actuated
position. Such a feature permits the user to partially squeeze or
actuate trigger 104 for performing a cholangiogram procedure or the
like.
[0119] Pawl switch 140 includes a finger lever 140a projecting from
housing 102, whereby pawl switch 140 may be actuated by a finger of
a user. Housing 102 of handle assembly 100 may be provided with
guard walls 102d disposed on opposed sides of finger lever 140a in
order to inhibit inadvertent actuation of pawl switch 140. Pawl
switch 140 is movable, upon actuation of finger lever 140a, between
a first position in which ratchet assembly 150 is "on" or
"activated", and a second position in which ratchet assembly 150 is
"off" or "de-activated." It is contemplated that pawl switch 140,
and in turn ratchet assembly 150, default to the first
position.
[0120] Pawl switch 140 further includes a first flange 140b
projecting a first distance from a pivot point thereof, and a
second flange 140c projecting a second distance from the pivot
point thereof, wherein the projection of the second flange 140c is
greater than the projection of the first flange 140b. First flange
140b of pawl switch 140 is selectively engagable by wall 130c of
proximal end 130a of release lever 130. In this manner, each time
an endoscopic assembly 200 is attached to handle assembly 100, and
release lever 130 is actuated, wall 130c of release lever 130
engages first flange 140b of pawl switch 140 to move pawl switch to
the first position (FIGS. 19-22).
[0121] Pawl switch 140 also includes a ramp or camming surface 140d
projecting therefrom which selectively engages a tab or finger 142a
of pawl actuator 142 to slidably move pawl actuator 142, and in
turn pawl spring 156, into and out of operative
engagement/registration with/from pawl 154.
[0122] Pawl actuator 142 is pivotally connected to housing 102 and
operatively connected to pawl switch 140 such that actuation of
pawl switch 140 actuates pawl actuator 142. Pawl actuator 142 is
slidably supported on a pair of support pins 143a, 143b, and a
biasing member 144 is provided to bias pawl actuator 142 against
pawl switch 140. In operation, with reference to FIGS. 11-14, when
pawl switch 140 is actuated to the second position, ramp or camming
surface 140d of pawl switch 140 acts on tab 142a of pawl actuator
142 to transversely slide pawl actuator 142 along support pins
143a, 143b and move pawl spring 156 out of operative
engagement/registration with pawl 154, thereby disabling the
operability of ratchet assembly 150. Also, as pawl actuator 142 is
slid transversely along support pins 143a, 143b, pawl actuator 142
biases biasing member 144.
[0123] Further in operation, with reference to FIGS. 8-10, when
pawl switch 140 is actuated to the first position, ramp or camming
surface 140d of pawl switch 140 is moved to permit biasing member
144 to expand and transversely slide pawl actuator 142 along
support pins 143a, 143b, whereby pawl spring 156 is moved back into
operative engagement/registration with pawl 154, thereby enabling
or re-enabling the operability of ratchet assembly 150.
[0124] Turning now to FIGS. 1, 2, 16 and 17, an embodiment of an
endoscopic assembly 200, of surgical clip applier 10, is shown and
described. Endoscopic assembly 200 includes a hub assembly 210, a
shaft assembly 220 extending from hub assembly 210, and a pair of
jaws 250 pivotally connected to a distal end of shaft assembly 220.
It is contemplated that endoscopic assembly 200 may be configured
to close, fire or form surgical clips similar to those shown and
described in U.S. Pat. No. 4,834,096, the entire content of which
is incorporated herein by reference.
[0125] Hub assembly 210 functions as an adapter assembly which is
configured for selective connection to rotation knob 160 and nose
102c of housing 102 of handle assembly 100. Hub assembly 210
includes an outer housing 212 having a cylindrical outer profile.
Outer housing 212 includes a first or right side half section 212a,
and a second or left side half section 212b. Outer housing 212 of
hub assembly 210 defines an outer annular channel 212c formed in an
outer surface thereof, and at least one (or an annular array) of
axially extending ribs 212d projecting from an outer surface
thereof. Outer annular channel 212c of outer housing 212 of
endoscopic assembly 200 is configured to receive catch 130d of
release lever 130 of handle assembly 100 (FIGS. 19-22) when
endoscopic assembly 200 is coupled to handle assembly 100.
[0126] Ribs 212d of outer housing 212 function as a
clocking/alignment feature during connection of endoscopic assembly
200 and handle assembly 100 with one another, wherein ribs 212d of
outer housing 212 of endoscopic assembly 200 are radially and
axially aligned with respective grooves 160b of rotation knob 160
of handle assembly 100. During connection of endoscopic assembly
200 and handle assembly 100, ribs 212d of outer housing 212 of
endoscopic assembly 200 are slidably received in respective grooves
160b of rotation knob 160 of handle assembly 100.
[0127] The connection of hub assembly 210 of endoscopic assembly
200 with rotation knob 160 of handle assembly 100 enables
endoscopic assembly 200 to rotate 360.degree., about a longitudinal
axis thereof, relative to handle assembly 100.
[0128] Outer housing 212 of hub assembly 210 further defines an
open proximal end 212e configured to slidably receive a distal end
of drive plunger 120 of handle assembly 100, when endoscopic
assembly 200 is coupled to handle assembly 100 and/or when surgical
clip applier 10 is fired.
[0129] As mentioned above, endoscopic assembly 200 includes a shaft
assembly 220 extending distally from hub assembly 210. Shaft
assembly 220 includes an elongate outer tube 222 having a proximal
end 222a supported and secured to outer housing 212 of hub assembly
210, a distal end 222b projecting from outer housing 212 of hub
assembly 210, and a lumen 222c (FIGS. 15 and 17) extending
longitudinally therethrough. Distal end 222b of outer tube 222
supports or defines an outer clevis 222d for pivotally supporting a
pair of jaws 250, as will be described in greater detail below.
[0130] Shaft assembly 220 further includes an inner shaft 224
slidably supported within lumen 222c of outer tube 222. Inner shaft
224 includes a proximal end 224a projecting proximally from
proximal end 222a of outer tube 222, and a distal end 224b defining
an inner clevis 224c for supporting a cam pin 224d which engages
camming slots 252c, 254c of a pair of jaws 250, as will be
described in greater detail below.
[0131] With reference to FIGS. 15 and 17, hub assembly 210 includes
a drive assembly 230 supported within outer housing 212 thereof.
Drive assembly 230 includes a cartridge cylinder 232 having a
cup-like configuration, wherein cartridge cylinder 232 includes an
annular wall 232a, a proximal wall 232b supported at and closing
off a proximal end of annular wall 232a, an open distal end 232c,
and a cavity or bore 232d defined therewithin.
[0132] Drive assembly 230 also includes a cartridge plunger 234
slidably supported within bore 232d of cartridge cylinder 232.
Cartridge plunger 234 is fixedly supported on inner shaft 224, at
the proximal end 224a thereof. Cartridge plunger 234 is sized and
configured for slidable receipt within bore 232d of cartridge
cylinder 232 of drive assembly 230. A ring, flange or the like 235
may be fixedly supported at a distal end of bore 232d of cartridge
cylinder 232, through which proximal end 224a of cartridge plunger
234 extends and which functions to maintain cartridge plunger 234
within bore 232d of cartridge cylinder 232.
[0133] Drive assembly 230 includes a first biasing member 236
(e.g., a compression spring) disposed within bore 232d of cartridge
cylinder 232. Specifically, first biasing member 236 is interposed
between proximal wall 232b of cartridge cylinder 232 and a proximal
surface of cartridge plunger 234. First biasing member 236 has a
first spring constant "K1" which is relatively more firm or more
stiff, as compared to a second spring constant "K2" of a second
biasing member 238, as is described in detail below.
[0134] Drive assembly 230 further includes a second biasing member
238 (e.g., a compression spring) supported on proximal end 224a of
inner shaft 224. Specifically, second biasing member 238 is
interposed between a proximal flange 222d of outer tube 222 and a
distal surface of cartridge plunger 234. Second biasing member 238
has a second spring constant "K2" which is relatively less firm or
less stiff, as compared to the first spring constant "K1" of first
biasing member 236.
[0135] As illustrated in FIGS. 15 and 17, endoscopic assembly 200
includes a pair of jaws 250 pivotally supported in a clevis 222d at
distal end 222b of outer tube 222 by a pivot pin 256. The pair of
jaws 250 includes a first jaw 252 and a second jaw 254. Each jaw
252, 254 includes a respective proximal end 252a, 254a, and a
respective distal end 252b, 254b, wherein proximal ends 252a, 254a
and distal ends 252b, 254b of jaws 252, 254 are pivotable about
pivot pin 256. Each proximal end 252a, 254a of respective jaws 252,
254 defines a cam slot 252c, 254c therein which is sized and
configured to receive cam pin 224d of inner shaft 224. In use, as
inner shaft 224 is axially displaced relative to outer shaft 222,
inner shaft 224 translated cam pin 224d thereof through cam slot
252c, 254c of jaws 252, 254 to thereby open or close the pair of
jaws 250.
[0136] When the pair of jaws 250 are in an open position, and a
new, unformed or open surgical clip (not shown) is located or
loaded within the distal ends 252b, 254b of jaws 252, 254 of the
pair of jaws 250, as inner shaft 224 is moved distally relative to
outer shaft 222, cam pin 224d is translated through cam slots 252c,
254c of jaws 252, 254. As cam pin 224d is translated through cam
slots 252c, 254c of jaws 252, 254 the distal ends 252b, 254b of
jaws 252, 254 are moved to the closed or approximated position to
close and/or form the surgical clip located or loaded
therewithin.
[0137] The dimensions of jaws 252, 254 and of cam slots 252c, 254c
of jaws 252, 254 determines an overall length required to move jaws
252, 254 from a fully open position to a fully closed position,
defining a closure stroke length of the pair of jaws 250.
[0138] With reference now to FIGS. 19-25, an operation or firing of
surgical clip applier 10, including endoscopic assembly 200
operatively connected to handle assembly 100, is shown and
described. With endoscopic assembly 200 operatively connected to
handle assembly 100, and with a new, unformed or open surgical clip
(not shown) is located or loaded within the distal ends 252b, 254b
of jaws 252, 254 of the pair of jaws 250, as trigger 104 of handle
assembly 100 is actuated drive bar 104b of trigger 104 acts on
drive plunger 120 to distally advance drive plunger 120. As trigger
104 is actuated, pawl 154 of ratchet assembly 150 begins to engage
rack 152 thereof. With pawl 154 engaged with rack 152, trigger 104
may not return to a fully unactuated position until trigger 104
completes a full actuation or stroke thereof.
[0139] As drive plunger 120 is distally advanced, a distal end of
drive plunger 120 presses against proximal wall 232b of cartridge
cylinder 232 of drive assembly 230 of endoscopic assembly 200 to
distally advance cartridge cylinder 232. Due to first spring
constant "K1" of first biasing member 236 being larger or greater
than second spring constant "K2" of second biasing member 238, as
cartridge cylinder 232 is advanced distally, cartridge cylinder 232
distally advances first biasing member 236, which in turn acts on
cartridge plunger 234 to distally advance cartridge plunger 234. As
cartridge plunger 234 is distally advanced, cartridge plunger 234
distally advances inner shaft 224 relative to outer shaft 222.
Being that second biasing member 238 is interposed between proximal
flange 222d of outer tube 222 and distal surface of cartridge
plunger 234, as cartridge plunger 234 is distally advanced,
cartridge plunger 234 also compresses second biasing member
238.
[0140] As inner shaft 224 is distally advanced relative to outer
shaft 222, inner shaft 224 distally advances cam pin 224d through
cam slot 252c, 254c of jaws 252, 254 to close the pair of jaws 250
and to close and/or form the surgical clip (not shown) loaded
within the pair of jaws 250. Cam pin 224d of inner shaft 224 is
advanced distally until cam pin 224d reaches an end of cam slots
252c, 254c of jaws 252, 254 of the pair of jaws 250 and/or until
the distal ends 252b, 254b of jaws 252, 254 of the pair of jaws 250
are fully approximated against one another (e.g., in contact with
one another or fully closed on the surgical clip (not shown)),
whereby cam pin 224d may not have reached the end of cam slots
252c, 254c of jaws 252, 254. This position may be considered a hard
stop of the pair of jaws 250. The axial distance that cam pin 224d
has traveled from a proximal-most position thereof to when cam pin
224d reaches the end of cam slots 252c, 254c of jaws 252, 254 or
when the distal ends 252b, 254b of jaws 252, 254 of the pair of
jaws 250 are fully approximated against one another, may also
define the closure stroke length of the pair of jaw 250.
[0141] When the pair of jaws 250 have reached the hard stop, or
when the cam pin 224d has reached an end of the closure stroke
length, pawl 154 of ratchet assembly 150 of handle assembly 100 may
not have cleared rack 152 thereof, and thus blocks or prevents
trigger 104 from returning to a fully unactuated position thereof.
Since the pair of jaws 250 cannot close any further, and since cam
pin 224d cannot be advanced distally any further, inner shaft 222
is also stopped from further distal advancement. However, as
mentioned above, in order to return trigger 104 to the fully
unactuated position, trigger 104 must first complete the full
actuation stroke thereof. As such, as trigger 104 is further
actuated to complete the full stroke thereof, as drive plunger 120
is continued to be driven distally, the distal end of drive plunger
120 continues to press against proximal wall 232b of cartridge
cylinder 232 of drive assembly 230 of endoscopic assembly 200 to
continue to distally advance cartridge cylinder 232.
[0142] With inner shaft 222, and in turn cartridge plunger 234,
stopped from any further distal advancement, as cartridge cylinder
232 is continued to be advanced distally, cartridge cylinder 232
begins to and continues to compress first biasing member 236 until
such time that pawl 154 of ratchet assembly 150 of handle assembly
100 clears and disengages rack 152 thereof. With pawl 154 of
ratchet assembly 150 clear and disengaged from rack 152, trigger
104 may be released and returned to the fully unactuated position
by hand, by a return spring 104a of trigger 104 and/or by first
biasing member 236 and second biasing member 238 of endoscopic
assembly 200.
[0143] In accordance with the present disclosure, the trigger
stroke length for trigger 104 of handle assembly 100 is constant or
fixed, while the closure stroke length of the pair of jaws 250 may
vary depending on the particular endoscopic assembly 200 connected
to handle assembly 100. For example, particular endoscopic
assemblies 200 may require the pair of jaws 250 thereof to travel a
relatively greater or smaller distance in order to complete a full
opening and closing thereof. As such, various sized and dimensioned
endoscopic assemblies, including a hub assembly in accordance with
the present disclosure, substantially similar to hub assembly 210,
may be connected to the universal handle assembly 100 and be
actuatable by the universal handle assembly 100.
[0144] Accordingly, various endoscopic assemblies, constructed in
accordance with the principles of the present disclosure, may be
provided which are also capable of firing or forming or closing
surgical clips of various sizes, materials, and configurations,
across multiple platforms for multiple different manufactures.
[0145] Turning now to FIGS. 26-29, an endoscopic surgical clip
applier, in accordance with the present disclosure, and assembly in
another configuration, is generally designated as 10'. Surgical
clip applier 10' generally includes reusable handle assembly 100,
at least one disposable or reusable endoscopic assembly 400
selectively connectable to and extendable distally from handle
assembly 100; and optionally at least one disposable surgical clip
cartridge assembly (not shown) selectively loadable into a shaft
assembly of a respective endoscopic assembly 400.
[0146] Turning now to FIGS. 1, 2, 16 and 17, an embodiment of an
endoscopic assembly 400, of surgical clip applier 10', is shown and
described. Endoscopic assembly 400 includes a hub assembly 410, a
shaft assembly 420 extending from hub assembly 410, and a pair of
jaws 450 pivotally connected to a distal end of shaft assembly 420.
It is contemplated that endoscopic assembly 400 may be configured
to close, fire or form surgical clips similar to those shown and
described in U.S. Pat. No. 7,819,886 or 7,905,890, the entire
contents of each of which is incorporated herein by reference.
[0147] Hub assembly 410 also functions as an adapter assembly which
is configured for selective connection to rotation knob 160 and
nose 102c of housing 102 of handle assembly 100. Hub assembly 410
includes an outer housing 412 having a cylindrical outer profile.
Outer housing 412 includes a first or right side half section 412a,
and a second or left side half section 412b. Outer housing 412 of
hub assembly 410 defines an outer annular channel 412c formed in an
outer surface thereof, and at least one (or an annular array) of
axially extending ribs 412d projecting from an outer surface
thereof. Outer annular channel 412c of outer housing 412 of
endoscopic assembly 400 is configured to receive catch 130d of
release lever 130 of handle assembly 100 (FIGS. 28 and 29) when
endoscopic assembly 400 is coupled to handle assembly 100.
[0148] Ribs 412d of outer housing 412 function as a
clocking/alignment feature during connection of endoscopic assembly
400 and handle assembly 100 with one another, wherein ribs 412d of
outer housing 412 of endoscopic assembly 400 are radially and
axially aligned with respective grooves 160b of rotation knob 160
(FIG. 18) of handle assembly 100. During connection of endoscopic
assembly 400 and handle assembly 100, ribs 412d of outer housing
412 of endoscopic assembly 400 are slidably received in respective
grooves 160b of rotation knob 160 of handle assembly 100.
[0149] The connection of hub assembly 410 of endoscopic assembly
400 with rotation knob 160 of handle assembly 100 enables
endoscopic assembly 400 to rotate 360.degree., about a longitudinal
axis thereof, relative to handle assembly 100.
[0150] Outer housing 412 of hub assembly 410 further defines an
open proximal end 412e configured to slidably receive a distal end
of drive plunger 120 of handle assembly 100, when endoscopic
assembly 400 is coupled to handle assembly 100 and/or when surgical
clip applier 10' is fired.
[0151] As mentioned above, endoscopic assembly 400 includes a shaft
assembly 420 extending distally from hub assembly 410. Shaft
assembly 420 includes an elongate outer tube 422 having a proximal
end 422a supported and secured to outer housing 412 of hub assembly
410, a distal end 422b projecting from outer housing 412 of hub
assembly 410, and a lumen 422c (FIG. 27) extending longitudinally
therethrough. Distal end 422b of outer tube 422 supports a pair of
jaws 450.
[0152] Shaft assembly 420 further includes an inner shaft 424
slidably supported within lumen 422c of outer tube 422. Inner shaft
424 includes a proximal end 424a projecting proximally from
proximal end 422a of outer tube 422, and a distal end 424b
configured to actuate the pair of jaws 450 to form a surgical clip
(not shown) that has been loaded into the pair of jaws 450.
Proximal end 424a, as illustrated in FIGS. 28 and 29, may define a
hook 424c or other translational force coupling feature.
[0153] With reference to FIGS. 27-29, hub assembly 410 includes a
drive assembly 430 supported within outer housing 412 thereof.
Drive assembly 430 includes a cartridge cylinder 432 having a
cup-like configuration, wherein cartridge cylinder 432 includes a
longitudinally split annular wall 432a, a proximal wall 432b
supported at and closing off a proximal end of annular wall 432a,
an open distal end 432c, a cavity or bore 432d defined therewithin,
and a pair of axially extending slits 432e. Cartridge cylinder 432
includes an annular flange 432f provided at distal end 432c
thereof. A ring, flange or the like 435 may be fixedly supported at
a proximal end of cartridge cylinder 432.
[0154] Drive assembly 430 also includes a cartridge plunger or key
434 slidably supported within bore 432d and within slits 432e of
cartridge cylinder 432. Cartridge plunger 434 is selectively
connectable to proximal end 424a of inner shaft 424. Cartridge
plunger 434 is sized and configured for slidable receipt within
slits 432e and bore 432d of cartridge cylinder 432 of drive
assembly 430. Cartridge plunger 434 includes an elongate stem or
body portion 434a having a proximal end 434b, and a distal end
434c, wherein distal end 434c of cartridge plunger 434 is
configured for selective connection to proximal end 424a of inner
shaft 424. Cartridge plunger 434 further includes a pair of opposed
arms 434d supported at the proximal end 434b thereof and which
extend in a distal direction along stem 434a and towards distal end
434c. Each arm 434d terminates in a radially extending finger 434e,
wherein fingers 434e project from cartridge cylinder 432 when
cartridge plunger 434 is disposed within cartridge cylinder
432.
[0155] Drive assembly 430 may also include a collar 437 defining a
lumen therethrough and through with inner shaft 424 and stem 434a
of cartridge plunger 434 extend. Collar 437 includes an outer
annular flange 437a extending therefrom.
[0156] Drive assembly 430 includes a first biasing member 436
(e.g., a compression spring) disposed about cartridge cylinder 432.
Specifically, first biasing member 436 is interposed between ring
435 supported on cartridge cylinder 432 and fingers 434e of
cartridge plunger 434. First biasing member 436 has a first spring
constant "K1" which is relatively more firm or more stiff, as
compared to a second spring constant "K2" of a second biasing
member 438, as is described in detail below.
[0157] Drive assembly 430 further includes a second biasing member
438 (e.g., a compression spring) supported on stem 434a of
cartridge plunger 434 and on collar 437. Specifically, second
biasing member 438 is interposed between a flange 437a of collar
437 and proximal end 434b of cartridge plunger 434. Second biasing
member 438 has a second spring constant "K2" which is relatively
less firm or less stiff, as compared to the first spring constant
"K1" of first biasing member 436.
[0158] Turning now to FIGS. 26-41, shaft assembly 420 of endoscopic
assembly 400 includes at least a spindle 440 slidably supported in
lumen 422c of outer tube 422, a wedge plate 460 slidably supported
within lumen 422c of outer tube 422 and interposed between the pair
of jaws 450 and spindle 440; a clip channel 470 fixedly supported
in lumen 422c of outer tube 422 and disposed adjacent the pair of
jaws 450 (supported in and extending from distal end 422b of outer
tube 422) on a side opposite wedge plate 460, and a pusher bar 480
slidably supported in lumen 422c of outer tube 422 and being
disposed adjacent clip channel 470.
[0159] Spindle 440 includes a proximal end 440 defining an
engagement feature (e.g., a nub or enlarged head) configured to
engage a complementary engagement feature provided in distal end
424b of inner shaft 424. Spindle 440 further includes a distal end
440b operatively connected to a jaw cam closure wedge 442 via a
slider joint 444. Jaw cam closure wedge 442 is selectively
actuatable by spindle 440 to engage camming features of the pair of
jaws 450 to close the pair of jaws 450 and form a surgical clip "C"
loaded therewithin.
[0160] Slider joint 444 supports a latch member 446 for selective
engagement with spindle 440. Latch member 446 may be cammed in a
direction toward spindle 440, wherein latch member 446 extends into
a corresponding slot formed in spindle 440 during actuation or
translation of spindle 440. In operation, during distal actuation
spindle 400, at a predetermined distance, latch member 446 is
mechanically forced or cammed into and engage a channel of spindle
440. This engagement of latch member 446 in the channel of spindle
440 allows slider joint 444 to move together with jaw cam closure
wedge 442. Jaw cam closure wedge 442 thus can engage the relevant
surfaces of the pair of jaws 450 to close the pair of jaws 450.
[0161] As illustrated in FIGS. 28 and 39, slider joint 444 is
connected, at a proximal end 444a thereof, to a channel formed in
spindle 440. A distal end 444b of slider joint 444 defines a
substantially T-shaped profile, wherein the distal end 444b thereof
is connected to jaw cam closure wedge 442. Latch member 446
functions as a linkage and is disposed to move through an aperture
444c in slider joint 444 to link with another fixed member and
prevent slider joint 444 from advancing jaw cam closure wedge 442,
and thus preventing the camming of jaw cam closure wedge 442 from
camming the pair of jaws 450 to a closed condition during an
initial stroke of trigger 104.
[0162] Spindle 440 is provided with a camming feature configured to
move a cam link 448 (pivotably connected to a filler component 466,
as will be described in greater detail below) a perpendicular
manner relatively to a longitudinal axis of spindle 440 during a
distal advancement of spindle 440.
[0163] Clip channel 470 of shaft assembly 420 slidably retains a
stack of surgical clips "C" therein for application, in seriatim,
to the desired tissue or vessel. A clip follower 472 is provided
and slidably disposed within clip channel 470 at a location
proximal of the stack of surgical clips "C". A biasing member 474
is provided to spring bias clip follower 472, and in turn, the
stack of surgical clips "C", distally. A clip channel cover 476 is
provided that overlies clip channel 470 to retain and guide clip
follower 472, biasing member 474 and the stack of surgical clips
"C" in clip channel 470.
[0164] As mentioned above, shaft assembly 420 includes a pusher bar
480 for loading a distal-most surgical clip "Cl" of the stack of
surgical clips "C" into the pair of jaws 450. Pusher bar 480
includes a pusher 480a at a distal end thereof for engaging a
backspan of the distal-most surgical clip "Cl" and urging the
distal-most surgical clip "Cl" into the pair of jaws 450. Pusher
bar 480 includes a fin or tab 480b extending therefrom and
extending into a slot 482a of a trip block 482. Fin 480b of pusher
bar 480 is acted upon by a biasing member (not shown) that is
supported in trip block 482 to bias pusher bar 480 in a proximal
direction.
[0165] In operation, in order for spindle 440 to advance pusher bar
480 during a distal movement thereof, spindle 440 supports a trip
lever 484 and a biasing member 486 (e.g., leaf spring). During a
distal movement of spindle 440, as illustrated in FIG. 31, a distal
nose or tip 484a of trip lever 484 selectively engages pusher bar
480 to distally advance pusher bar 480 and load distal-most
surgical clip "Cl" into the pair of jaws 450.
[0166] Also as mentioned above, shaft assembly 420 further includes
a wedge plate 460 that is biased to a proximal position by a wedge
plate spring 462. Wedge plate 460 is a flat bar shaped member
having a number of windows formed therein. Wedge plate 460 has a
distal-most position wherein a tip or nose of wedge plate 460 is
inserted between the pair of jaws 450 to maintain the pair of jaws
450 in an open condition for loading of the distal-most surgical
clip "Cl" therein. Wedge plate 460 has a proximal-most position,
maintained by wedge plate spring 462, wherein the tip or nose of
wedge plate 460 is retracted from between the pair of jaws 450.
[0167] As illustrated in FIGS. 28 and 38, wedge plate 460 defines a
"U" or "C" shaped aperture or window 460b in a side edge thereof.
The "C" shaped aperture or window 460b of wedge plate 460
selectively engages a cam link 448 supported on a filler plate 466.
Cam link 448 selectively engages a surface of "C" shaped aperture
or window 460b of wedge plate 460 to retain wedge plate 460 in a
distal-most position such that a distal tip or nose 460a of wedge
plate 460 is maintained inserted between the pair of jaws 450 to
maintain the pair of jaws 450 splayed apart.
[0168] Shaft assembly 420 further includes a filler component 466
interposed between clip channel 470 and wedge plate 460, at a
location proximal of the pair of jaws 450. Filler component 466
pivotably supports a cam link 448 that is engagable with wedge
plate 460. In operation, during a distal advancement of spindle
440, a camming feature of spindle 440 engages a cam link boss of
cam link 448 to thereby move cam link 448 out of engagement of
wedge plate 460 and permit wedge plate 460 to return to the
proximal-most position as a result of biasing member 462.
[0169] Trip block 482 defines an angled proximal surface 482b for
engagement with a corresponding surface of trip lever 484 that will
be discussed herein. As mentioned above, notch or slot 482a of trip
block 482 is for receipt of fin 480b of pusher bar 480. In order to
disengage trip lever 484 from a window 480c (FIG. 31) of pusher bar
480, and allow pusher bar 480 to return to a proximal-most position
following loading of a surgical clip "C" into the pair of jaws 450,
angled proximal surface 482b trip block 482 engages trip lever 484
to cam trip lever 484 out of window 480c of pusher bar 480. It is
contemplated that spindle 440 may define a first cavity and a
second cavity therein for receiving trip lever 484 and trip lever
biasing spring 486, respectively. The first cavity may be provided
with a pivoting boss to allow trip lever 484 to pivot between a
first position and a second position. Trip lever biasing spring 486
may rest in the second cavity.
[0170] Trip lever biasing spring 486 functions to maintain a tip of
trip lever 484 in contact with pusher bar 480, and more
specifically, within window 480c of pusher bar 480 (FIG. 31) such
that distal advancement of spindle 440 results in distal
advancement of pusher bar 480, which in turn results in a loading
of a distal-most surgical clip "Cl" in the pair of jaws 450.
[0171] With reference to FIGS. 28, 33 and 36, clip applier 10' also
has a lockout bar 490. Lockout bar 490 includes a first end, and a
second opposite hook end. The second hook end of lockout bar 490 is
adapted to engage clip follower 472 of shaft assembly 420. Lockout
bar 490 is pivotally retained in a slot formed in clip follower
472. Lockout bar 490 does not by itself lockout clip applier 10',
but instead cooperates with the ratchet mechanism 150 of handle
assembly 100 to lock out clip applier 10'.
[0172] Lockout bar 490 is adapted to move distally with clip
follower 472 each time clip applier 10' is fired, and clip follower
472 is advanced distally. In operation, each time a surgical clip
"C" is fired from clip applier 10', clip follower 472 will advance
distally relative to the clip channel 470.
[0173] Pusher bar 480 defines a distal window therein (not shown).
In operation, when clip follower 472 is positioned beneath pusher
bar 480 (e.g., when there are no remaining surgical clips), a
distal end 490a of lockout bar 490 will deflect upward (due to a
biasing of a lockout biasing member 492), and enter a distal window
480d of pusher bar 480 to engage pusher bar 480 at a distal end of
distal window 480d. Further, a proximal end 490b of lockout bar
490, defines a hook (FIG. 37), which is rotated into and engages an
aperture defined in a floor of clip channel 470.
[0174] With the distal end of pusher bar 480 disposed within distal
window 480d of pusher bar 480, pusher bar 480, and in turn, spindle
440 cannot return to a fully proximal position. Since spindle 440
cannot return to the fully proximal position, pawl 152 of ratchet
mechanism 150 of handle assembly 100 cannot return to the home or
initial position relative to rack 154 thereof. Instead, pawl 154
will remain in an intermediate position along rack 154, thus
preventing trigger 104 from returning to a fully unactuated
position.
[0175] With continued reference to FIGS. 26-29, an operation or
firing of surgical clip applier 10', including endoscopic assembly
400 operatively connected to handle assembly 100, is shown and
described. With endoscopic assembly 400 operatively connected to
handle assembly 100, as trigger 104 of handle assembly 100 is
actuated drive bar 104b of trigger 104 acts on drive plunger 120 to
distally advance drive plunger 120. As trigger 104 is actuated,
pawl 154 of ratchet assembly 150 begins to engage rack 152 thereof.
With pawl 154 engaged with rack 152, trigger 104 may not return to
a fully unactuated position until trigger 104 completes a full
actuation or stroke thereof.
[0176] As drive plunger 120 is distally advanced, a distal end of
drive plunger 120 presses against proximal wall 432b of cartridge
cylinder 432 of drive assembly 430 of endoscopic assembly 400 to
distally advance cartridge cylinder 432. Due to first spring
constant "K1" of first biasing member 436 being larger or greater
than second spring constant "K2" of second biasing member 438, as
cartridge cylinder 432 is advanced distally, ring 435 acts on first
biasing member 436 which in turn acts on fingers 434e of cartridge
plunger 434 to push cartridge plunger 434 distally. As cartridge
plunger 434 is distally advanced, cartridge plunger 434 distally
advances inner shaft 424 relative to outer shaft 422. Being that
second biasing member 438 is interposed between a flange 437a of
collar 437 and proximal end 434b of cartridge plunger 434, as
cartridge plunger 434 is distally advanced, cartridge plunger 434
also compresses second biasing member 438.
[0177] As inner shaft 424 is distally advanced relative to outer
shaft 422, inner shaft 424 actuates a clip pusher (not shown) which
in turn acts on a distal-most surgical clip (not shown) of a stack
of surgical clips (not shown) to distally advance the distal-most
surgical clip into the pair of jaws 450. Following loading of the
distal-most surgical clip into the pair of jaws 450, the distal
advancement of inner shaft 424 effects a closure of the pair of
jaws 450 to form the surgical clip loaded therewithin.
[0178] When the pair of jaws 450 have fully closed to form the
surgical clip loaded therein, or when the pair of jaws 450 have
reached a hard stop, pawl 154 of ratchet assembly 150 of handle
assembly 100 may not have cleared rack 152 thereof, and thus blocks
or prevents trigger 104 from returning to a fully unactuated
position thereof. Since the pair of jaws 450 cannot close any
further, inner shaft 422 is also stopped from further distal
advancement. However, as mentioned above, in order to return
trigger 104 to the fully unactuated position, trigger 104 must
first complete the full actuation stroke thereof. As such, as
trigger 104 is further actuated to complete the full stroke
thereof, as drive plunger 120 is continued to be driven distally,
the distal end of drive plunger 120 continues to press against
proximal wall 432b of cartridge cylinder 432 of drive assembly 430
of endoscopic assembly 400 to continue to distally advance
cartridge cylinder 432.
[0179] With inner shaft 422, and in turn cartridge plunger 434,
stopped from any further distal advancement, as cartridge cylinder
432 is continued to be advanced distally relative to cartridge
plunger 434, cartridge cylinder 432 begins to and continues to
compress first biasing member 436 until such time that pawl 154 of
ratchet assembly 150 of handle assembly 100 clears and disengages
rack 152 thereof. With pawl 154 of ratchet assembly 150 clear and
disengaged from rack 152, trigger 104 may be released and returned
to the fully unactuated position by hand, by a return spring (not
shown) of trigger 104 or handle assembly 100 and/or by first
biasing member 436 and second biasing member 438 of endoscopic
assembly 400.
[0180] In accordance with the present disclosure, the trigger
stroke length for trigger 104 of handle assembly 100 is constant or
fixed, while the closure stroke length of the pair of jaws 450 of
endoscopic assembly 400 connected to handle assembly 100 is
different than, for example, the closure stroke of the pair of jaws
250 of endoscopic assembly 200. For example, endoscopic assembly
400 may require the pair of jaws 450 thereof to travel a relatively
greater or smaller distance as compared to the pair of jaws 250 of
endoscopic assembly 200 in order to complete a full opening and
closing thereof. As such, universal handle assembly 100 may be
loaded with, and is capable of firing, either endoscopic assembly
200 or endoscopic assembly 400.
[0181] In accordance with the present disclosure, while the trigger
stroke length of trigger 104 of handle assembly 100 is constant,
the closure stroke length for the pair of jaws 250, 450 of each
endoscopic assembly 200, 400 is unique for each respective
endoscopic assembly 200, 400. Accordingly, each drive assembly 230,
430 of respective endoscopic assemblies 200, 400 functions to
accommodate for the variations in the closure stroke lengths for
the pair of jaws 250, 450 of respective endoscopic assemblies 200,
400.
[0182] To the extent consistent, handle assembly 100 and/or
endoscopic assemblies 200, 400 may include any or all of the
features of the handle assembly and/or endoscopic assemblies
disclosed and described in International Patent Application No.
PCT/CN2015/080845, filed Jun. 5, 2015, entitled "Endoscopic
Reposable Surgical Clip Applier," International Patent Application
No. PCT/CN2015/091603, filed on Oct. 10, 2015, entitled "Endoscopic
Surgical Clip Applier," International Patent Application No.
PCT/CN2015/093626, filed on Nov. 3, 2015, entitled "Endoscopic
Surgical Clip Applier," and/or PCT/CN2015/094195, filed on Nov. 10,
2015, entitled "Endoscopic Reposable Surgical Clip Applier," the
entire content of each of which being incorporated herein by
reference.
[0183] Surgical instruments such as the clip appliers described
herein may also be configured to work with robotic surgical systems
and what is commonly referred to as "Telesurgery." Such systems
employ various robotic elements to assist the surgeon and allow
remote operation (or partial remote operation) of surgical
instrumentation. Various robotic arms, gears, cams, pulleys,
electric and mechanical motors, etc. may be employed for this
purpose and may be designed with a robotic surgical system to
assist the surgeon during the course of an operation or treatment.
Such robotic systems may include remotely steerable systems,
automatically flexible surgical systems, remotely flexible surgical
systems, remotely articulating surgical systems, wireless surgical
systems, modular or selectively configurable remotely operated
surgical systems, etc.
[0184] The robotic surgical systems may be employed with one or
more consoles that are next to the operating theater or located in
a remote location. In this instance, one team of surgeons or nurses
may prep the patient for surgery and configure the robotic surgical
system with one or more of the instruments disclosed herein while
another surgeon (or group of surgeons) remotely control the
instruments via the robotic surgical system. As can be appreciated,
a highly skilled surgeon may perform multiple operations in
multiple locations without leaving his/her remote console which can
be both economically advantageous and a benefit to the patient or a
series of patients.
[0185] The robotic arms of the surgical system are typically
coupled to a pair of master handles by a controller. The handles
can be moved by the surgeon to produce a corresponding movement of
the working ends of any type of surgical instrument (e.g., end
effectors, graspers, knifes, scissors, etc.) which may complement
the use of one or more of the embodiments described herein. The
movement of the master handles may be scaled so that the working
ends have a corresponding movement that is different, smaller or
larger, than the movement performed by the operating hands of the
surgeon. The scale factor or gearing ratio may be adjustable so
that the operator can control the resolution of the working ends of
the surgical instrument(s).
[0186] The master handles may include various sensors to provide
feedback to the surgeon relating to various tissue parameters or
conditions, e.g., tissue resistance due to manipulation, cutting or
otherwise treating, pressure by the instrument onto the tissue,
tissue temperature, tissue impedance, etc. As can be appreciated,
such sensors provide the surgeon with enhanced tactile feedback
simulating actual operating conditions. The master handles may also
include a variety of different actuators for delicate tissue
manipulation or treatment further enhancing the surgeon's ability
to mimic actual operating conditions.
[0187] Referring to FIG. 42, a medical work station is shown
generally as work station 1000 and generally may include a
plurality of robot arms 1002, 1003; a control device 1004; and an
operating console 1005 coupled with control device 1004. Operating
console 1005 may include a display device 1006, which may be set up
in particular to display three-dimensional images; and manual input
devices 1007, 1008, by means of which a person (not shown), for
example a surgeon, may be able to telemanipulate robot arms 1002,
1003 in a first operating mode.
[0188] Each of the robot arms 1002, 1003 may include a plurality of
members, which are connected through joints, and an attaching
device 1009, 1011, to which may be attached, for example, a
surgical tool "ST" supporting an end effector 1100, in accordance
with any one of several embodiments disclosed herein, as will be
described in greater detail below.
[0189] Robot arms 1002, 1003 may be driven by electric drives (not
shown) that are connected to control device 1004. Control device
1004 (e.g., a computer) may be set up to activate the drives, in
particular by means of a computer program, in such a way that robot
arms 1002, 1003, their attaching devices 1009, 1011 and thus the
surgical tool (including end effector 1100) execute a desired
movement according to a movement defined by means of manual input
devices 1007, 1008. Control device 1004 may also be set up in such
a way that it regulates the movement of robot arms 1002, 1003
and/or of the drives.
[0190] Medical work station 1000 may be configured for use on a
patient 1013 lying on a patient table 1012 to be treated in a
minimally invasive manner by means of end effector 1100. Medical
work station 1000 may also include more than two robot arms 1002,
1003, the additional robot arms likewise being connected to control
device 1004 and being telemanipulatable by means of operating
console 1005. A medical instrument or surgical tool (including an
end effector 1100) may also be attached to the additional robot
arm. Medical work station 1000 may include a database 1014, in
particular coupled to with control device 1004, in which are
stored, for example, pre-operative data from patient/living being
1013 and/or anatomical atlases.
[0191] Reference is made herein to U.S. Patent Publication No.
2012/0116416, filed on Nov. 3, 2011, now U.S. Pat. No. 8,828,023,
entitled "Medical Workstation," the entire content of which is
incorporated herein by reference, for a more detailed discussion of
the construction and operation of an exemplary robotic surgical
system.
[0192] It is contemplated, and within the scope of the present
disclosure, that other endoscopic assemblies, including a pair of
jaws having a unique and diverse closure stroke length thereof, may
be provided with a drive assembly, similar to any of the drive
assemblies described herein, for accommodating and adapting the
closure stroke length for the pair of jaws thereof to the constant
trigger stroke length.
[0193] Accordingly, various endoscopic assemblies, constructed in
accordance with the principles of the present disclosure, may be
provided which are also capable of firing or forming or closing
surgical clips of various sizes, materials, and configurations,
across multiple platforms for multiple different manufactures.
[0194] It should be understood that the foregoing description is
only illustrative of the present disclosure. Various alternatives
and modifications can be devised by those skilled in the art
without departing from the disclosure. Accordingly, the present
disclosure is intended to embrace all such alternatives,
modifications and variances. The embodiments described with
reference to the attached drawing figures are presented only to
demonstrate certain examples of the disclosure. Other elements,
steps, methods and techniques that are insubstantially different
from those described above and/or in the appended claims are also
intended to be within the scope of the disclosure.
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