Surgical Forceps Including Pulley Blade Reverser Mechanism
First Claim
1. A forceps comprising:
- first and second shaft members each having a jaw member disposed at a distal end thereof, at least one of the jaw members moveable from an open position to a closed position for grasping tissue therebetween, at least one of the jaw members including a blade slot defined therein and extending longitudinally therealong, the blade slot configured for reciprocation of a blade therethrough; and
an actuation assembly disposed within one of the shaft members, the actuation assembly configured for selectively translating the blade between a retracted position and an extended position wherein the blade extends at least partially through the blade slot in the extended position, the actuation assembly including;
an actuator;
a compliance member coupling the actuator to a cable disposed within the shaft member;
a blade holder mechanically engaging the cable and having the blade disposed at a distal end thereof; and
at least one pulley operably coupled to the cable such that translating the actuator proximally translates the blade distally to the extended position.
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Accused Products
Abstract
A forceps includes first and second shafts each having a jaw disposed at an end thereof. At least one jaw is moveable from an open to a closed position for grasping tissue therebetween. At least one jaw includes a blade slot defined therein and extending therealong for reciprocation of a blade therethrough. An actuation assembly is disposed within one of the shafts and is configured for translating the blade between a retracted and an extended position. The blade extends at least partially through the blade slot in the extended position. The actuation assembly includes an actuator extending from the shaft. A compliance member couples the actuator to a cable disposed within the shaft. A blade holder engages the cable and has the blade disposed at an end thereof. At least one pulley is coupled to the cable such that translating the actuator proximally translates the blade distally.
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Citations
14 Claims
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1. A forceps comprising:
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first and second shaft members each having a jaw member disposed at a distal end thereof, at least one of the jaw members moveable from an open position to a closed position for grasping tissue therebetween, at least one of the jaw members including a blade slot defined therein and extending longitudinally therealong, the blade slot configured for reciprocation of a blade therethrough; and an actuation assembly disposed within one of the shaft members, the actuation assembly configured for selectively translating the blade between a retracted position and an extended position wherein the blade extends at least partially through the blade slot in the extended position, the actuation assembly including; an actuator; a compliance member coupling the actuator to a cable disposed within the shaft member; a blade holder mechanically engaging the cable and having the blade disposed at a distal end thereof; and at least one pulley operably coupled to the cable such that translating the actuator proximally translates the blade distally to the extended position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An actuation assembly configured for use with a forceps, the actuation assembly comprising:
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an actuator configured for selectively translating a blade between a retracted position and an extended position; a shear pin defining a pre-determined load limit coupling the actuator to a cable loop; a blade holder coupled to the cable loop and having the blade disposed at a distal end thereof; at least one pulley operably coupled to the cable such that translating the actuator proximally translates the blade distally to the extended position; and wherein, when a force on the blade exceeds the pre-determined load limit, the shear pin disengages the actuator from the cable such that translating the actuator proximally no longer translates the blade distally.
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14. An actuation assembly configured for use with a forceps, the actuation assembly comprising:
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an actuator configured for selectively translating a blade between a retracted position and an extended position; a compression spring coupling the actuator to a cable loop; a blade holder coupled to the cable loop and having the blade disposed at a distal end thereof; at least one pulley operably coupled to the cable such that translating the actuator proximally translates the blade distally to the extended position; and wherein, the compression spring is compressible in response to a load on the blade such that, when compressed, the compression spring absorbs at least a portion of the load on the blade and thereby reduces the load on the blade.
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Specification