Endoscopic surgical clip applier
First Claim
1. An apparatus for application of surgical clips to body tissue, the apparatus comprising:
- a shaft assembly including an upper housing and a lower housing, the shaft assembly having;
first and second jaw members mounted adjacent a distal end portion of the shaft assembly and movable between a spaced-apart position and an approximated position;
a wedge plate positioned adjacent the first and second jaw members and configured for selective interposition therebetween to move the first and second jaw members to the spaced-apart position;
a drive channel positioned adjacent the first and second jaw members and configured for selective camming of the first and second jaw members to move the first and second jaw members to the approximated position;
a wedge plate rack mechanism operatively interposed between a channel of the lower housing and the drive channel, the wedge plate rack mechanism including;
a wedge plate rack operatively coupled to the wedge plate such that a distal movement of the wedge plate rack is translated into a distal movement of the wedge plate and a proximal movement of the wedge plate rack is translated into a proximal movement of the wedge plate; and
a single gear making contact with each of the wedge plate rack and the drive channel such that distal movement of the drive channel is translated into the proximal movement of the wedge plate rack and a proximal movement of the drive channel is translated into the distal movement of the wedge plate rack, wherein the distal movement of the drive channel engages a camming surface of the first and second jaw members to move the first and second jaw members to the approximated position to form a surgical clip therebetween and wherein the proximal movement of the drive channel engages the distal movement of the wedge plate to interpose the wedge plate between the first and second jaw members such that the first and second jaw members are in the spaced-apart position, wherein a first portion of the single gear contacts a portion of the wedge plate rack and a second portion of the single gear selectively contacts a portion of the drive channel.
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Accused Products
Abstract
An apparatus for application of surgical clips includes a lockout system selectively engagable with a pusher bar to prevent the pusher bar from returning to a home position and to prevent a trigger from completing a full stroke when a plurality of clips are substantially exhausted. The apparatus may include a trip mechanism including a trip lever biased into contact with the pusher bar, wherein distal movement of the drive bar moves the trip mechanism until the trip lever engages a lip of the pusher bar and in turn distally moves the pusher bar. The apparatus may include a wedge plate including a distal end placeable between spaced-apart jaw members, wherein the wedge plate is moved proximally to withdraw the distal end thereof from between the jaw members when a drive channel is moved in a distal direction.
1140 Citations
21 Claims
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1. An apparatus for application of surgical clips to body tissue, the apparatus comprising:
a shaft assembly including an upper housing and a lower housing, the shaft assembly having; first and second jaw members mounted adjacent a distal end portion of the shaft assembly and movable between a spaced-apart position and an approximated position; a wedge plate positioned adjacent the first and second jaw members and configured for selective interposition therebetween to move the first and second jaw members to the spaced-apart position; a drive channel positioned adjacent the first and second jaw members and configured for selective camming of the first and second jaw members to move the first and second jaw members to the approximated position; a wedge plate rack mechanism operatively interposed between a channel of the lower housing and the drive channel, the wedge plate rack mechanism including; a wedge plate rack operatively coupled to the wedge plate such that a distal movement of the wedge plate rack is translated into a distal movement of the wedge plate and a proximal movement of the wedge plate rack is translated into a proximal movement of the wedge plate; and a single gear making contact with each of the wedge plate rack and the drive channel such that distal movement of the drive channel is translated into the proximal movement of the wedge plate rack and a proximal movement of the drive channel is translated into the distal movement of the wedge plate rack, wherein the distal movement of the drive channel engages a camming surface of the first and second jaw members to move the first and second jaw members to the approximated position to form a surgical clip therebetween and wherein the proximal movement of the drive channel engages the distal movement of the wedge plate to interpose the wedge plate between the first and second jaw members such that the first and second jaw members are in the spaced-apart position, wherein a first portion of the single gear contacts a portion of the wedge plate rack and a second portion of the single gear selectively contacts a portion of the drive channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for application of surgical clips to body tissue, the apparatus comprising:
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a shaft assembly; first and second jaw members extending from a distal end portion of the shaft assembly, the first and second jaw members movable between a spaced-apart position and an approximated position; a drive channel positioned adjacent the first and second jaw members and configured to move the jaw members to the approximated position when the drive channel is in a distal position; a wedge plate slidably supported in the shaft assembly, the wedge plate including a distal portion configured and dimensioned for placement between the first and second jaw members when the drive channel is in a proximal position and the first and second jaw members are in the spaced-apart position; and a wedge plate rack mechanism supported in the shaft assembly, the wedge plate rack mechanism including, a single gear making contact with each of the wedge plate and the drive channel such that a distal displacement of the drive channel is translated by the gear into a proximal displacement of the wedge plate and a proximal displacement of the drive channel is translated by the gear into a distal displacement of the wedge plate, wherein the proximal displacement of the wedge plate withdraws the distal portion of the wedge plate from between the first and second jaw members such that the first and second jaw members are capable of being moved to the approximated position to form a surgical clip therebetween and wherein the distal displacement of the wedge plate moves the distal portion of the wedge plate between the first and second jaw members such that the first and second jaw members are in the spaced-apart position, wherein a portion of the single gear selectively contacts a portion of the drive channel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification