Balanced ultrasonic blade including a plurality of balance asymmetries

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;
• a balanced ultrasonically actuated blade attached to said distal end of said transmission rod, wherein said balanced ultrasonically actuated blade comprises:
• a distal end;
• a proximal end;
• a curved treatment portion;
• 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 balance asymmetries are positioned to counter torque created at said proximal end of said blade by said curved treatment portion.

An ultrasonic surgical instrument including a balanced end effector, wherein said end effector comprises:

• a handle including an ultrasonic handpiece;
• an ultrasonic transmission rod having a proximal end and a distal end, wherein said proximal end is operatively connected to said handpiece;
• 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.

An ultrasonic surgical instrument comprising:

• a handle;
• an ultrasonic transmission rod having a proximal end and a distal end wherein said proximal end is operatively connected to said handle;
• a balanced ultrasonically actuated blade attached to said distal end of said transmission rod, wherein said balanced ultrasonically actuated blade comprises:
• a distal end;
• a proximal end;
• a curved treatment portion;
• and
• a balance portion including first and second balance asymmetries wherein said balance portion extends from said distal end of said 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.