Surgical clip applier

摘要

Surgical clip appliers are provided and include a housing; at least one handle pivotably connected to the housing; a channel assembly extending distally from the housing; a clip carrier disposed within the channel assembly and defining a channel and a plurality of windows therein; and a plurality of clips slidably disposed within the channel of the clip carrier. The surgical clip appliers further include a drive channel reciprocally disposed within at least one of the housing and the channel assembly; a wedge plate reciprocally disposed within the channel assembly; a pusher bar reciprocally positioned within the housing and the channel assembly; and a motion multiplier system having a plurality of linkage members configured to distally move the pusher bar by an incremental amount upon an initial actuation of the handles, and configured to proximally move the pusher bar and the wedge plate subsequent to the initial actuation of the handles.

主权项

1. A surgical clip applier for applying surgical clips to body tissue, the surgical clip applier comprising:
a housing; at least one handle pivotably connected to the housing; a drive channel reciprocally disposed at least partially within the housing, the drive channel having a first end operatively connected to the at least one handle; a pusher bar reciprocally positioned at least partially within the housing, the pusher bar having a proximal end operatively connected to at least one handle and a distal end defining a pusher, wherein the distal end of the pusher bar is configured for engagement with a distal-most clip of a plurality of clips loaded in the clip applier; and a motion multiplier system having a plurality of linkage members configured to distally move the pusher bar by an incremental amount upon an initial actuation of the at least one handle, and configured to proximally move the pusher bar subsequent to the initial actuation of the at least one handle; wherein the plurality of linkages of the motion multiplier system include:
a proximal linkage member pivotally supported in the housing and operatively connected to the drive channel;a pivoting drive arm interconnecting the drive channel and the proximal linkage member; anda distal linkage member interconnecting the proximal linkage member to the pusher bar;wherein a distal translation of the drive channel causes the proximal linkage member to pivotally rotate via the pivoting drive arm, such that the proximal linkage member causes a first end of the distal linkage member to pivotally rotate in a first direction and a second end of the distal linkage member to slidably move the pusher bar in a distal directions;wherein a further distal translation of the drive channel causes the proximal linkage member to pivotally rotate via the pivoting drive arm, such that the proximal linkage member causes the first end of the distal linkage member to pivotally rotate in a second direction and the second end of the distal linkage member to slidably move the pusher bar in a proximal direction.