CLAMP COAGULATOR/CUTTING SYSTEM FOR ULTRASONIC SURGICAL INSTRUMENTS

摘要

An ultrasonic surgical apparatus includes an ultrasonic surgical instrument (10) having a handpiece (14) with a transducer for converting an electrical signal into longitudinal virbratory motion of a blade (20) connected to the handpiece and an accessory (12) releasably connected to the handpiece to enable clamping of tissue against the vibrating blade to afford improved coagulating and cutting of tissue. Scissors-like grips (26) actuate a pivoted clamp jaw (24) along one side of the ultrasonically vibrating blade (20) to compress and bias tissue against the blade in a direction normal to the direction of longitudinal vibratory movement. The clamp jaw and blade are rotatable relative to one another to align a selected blade edge of a multi-edged blade with the clamp jaw for cutting and coagulating while clamping or to circumferentially space a selected blade edge from the clamp jaw for cutting and coagulating without clamping.