| 主权项 |
1. A forceps, comprising:
first and second shaft members pivotably coupled to one another about a pivot, each shaft member defining a proximal end and a distal end and having a jaw member engaged at the distal end thereof, the shaft members pivotable relative to one another about the pivot from a spaced-apart position to an approximated position to pivot the jaw members relative to one another about the pivot from an open position to a closed position for grasping tissue therebetween; a blade configured for reciprocation through at least one of the jaw members; a trigger assembly operably engaged to the first shaft member between the pivot and the proximal end of the first shaft member, the trigger assembly selectively translating the blade between a retracted position and an extended position wherein the blade extends at least partially through the at least one jaw member in the extended position, the trigger assembly including:
a rotatable trigger;a linkage coupled at a first end to the rotatable trigger and coupled at a second end to the blade, wherein rotation of the rotatable trigger from a first position to a second position moves the linkage to effect translation of the blade from the retracted position to the extended position; andan interference member, wherein pivoting of the shaft members from the spaced-apart position to the approximated position to pivot the jaw members from the open position to the closed position urges the second shaft member into contact with the interference member to move the interference member from a locked position to an unlocked position, the interference member engaged with the linkage when in the locked position to inhibit movement of the linkage, thereby inhibiting translation of the blade from the retracted position to the extended position. |
