Patent ID: 6436115
Filing Date: 2002-08-20
Classification: A61B

Abstract:
An end effector for use in an ultrasonic surgical instrument, wherein said end effector comprises:an ultrasonic transmission rod having a proximal end and a distal end; an ultrasonically actuated blade attached to said distal end of said transmission rod, wherein said ultrasonically actuated blade comprises: a distal end; a proximal end connected to said transmission rod at a longitudinal vibratory node point; a treatment portion including at least one functional asymmetry; and a balance portion including first and second balance asymmetries wherein said balance portion extends from said distal end of said ultrasonic transmission rod to a proximal end of said treatment portion and said treatment portion extends from a distal end of said balance portion to said distal end of said blade, wherein said first and second balance asymmetries are positioned to counter torque created at said proximal end of said blade by said functional asymmetry.