VESSEL SEALER AND DIVIDER

摘要

An electrosurgical instrument is disclosed for performing at least one of sealing and dividing tissue. The instrument has a housing with a shaft attached thereto. A first jaw member is provided which is movable relative to a secon d jaw member. The first jaw member is attached to the shaft and is relatively movable from a first open position wherein the jaw members are disposed in spaced relation relative to one another to a second closed position wherein the jaw members cooperate to grasp tissue therebetween. A drive rod assembly is provided which imparts movement of the jaw members between the first and second positions. A handle assembly is attached to the housing. The handle assembly actuates the drive rod assembly. The handle assembly includes a four-bar mechanical linkage designed to reciprocate the drive rod assembly t o actuate the jaw members between the first and second positions. The four-bar mechanical linkage includes two handles, a link and a rotating cam-like piston. The rotating cam-like piston, upon movement of the handles relative to one another, rotates to correspondingly translate the drive rod assembly to impa rt movement to the jaw members between the first and second positions.