Instrument for cutting tissue

摘要

A surgical instrument (10,100,212,412) for cutting body tissue comprises a handle portion (12,112,228,428) an elongated body portion having a central longitudinal axis, the elongated body portion (20,120,224,424) extending distally from the handle portion, a vibration coupler (28,128,250,450) adapted to be operably connected to an ultrasonic generator and having a longitudinal axis, the vibration coupler being position in the elongated body portion, a blade member (30,130,258,458) extending from a distal portion of the vibration coupler, the blade member having a longitudinal axis generally aligned with the longitudinal axis of the vibration coupler and having a generally straight cutting surface (32,132,259,459) forming an acute angle with respect to the longitudinal axis of the vibration coupler and forming an obtuse angle with respect to an axis perpendicular to a longitudinal axis of the vibration coupler, the cutting surface extending downwardly and outwardly from a central longitudinal axis of the elongated body portion, a clamp member (38,138,260,460) movable from an open position spaced further from the cutting surface to a clamped position to capture tissue between the clamp and the cutting surface, wherein the clamp member is pivoted from the open to the clamped position, and a transducer removably connected to the handle portion.