Flue for Ultrasonic Aspiration Surgical Horn

A flue for use with an ultrasonic horn comprising:

• an internal surface, wherein the internal surface includes an arcuate region and a plurality of protrusions, wherein the plurality of protrusions are distributed at locations that correspond to locations on or about a node of the ultrasonic horn, and wherein the plurality of protrusions form one or more bridges.

An ultrasonic surgical apparatus, comprising:

• an ultrasonic horn having an external surface and comprising a first horn extender and a second horn extender, wherein the second horn extender extends distally from the first horn extender, and the second horn extender has an external diameter smaller than an external diameter of the first horn extender;
• a flue having an internal surface, a proximal end, and distal end and comprising a first flue extender and a second flue extender, wherein the second flue extender extends distally from the first flue extender, and wherein the second flue extender has an internal diameter smaller than an internal diameter of the first flue extender, the first and second flue extenders being configured to at least partially enclose the first and second horn extenders, respectively, wherein the internal surface of the second flue extender comprises an arcuate region and a plurality of protrusions forming a bridge that limits contact between the arcuate region of the internal surface of the second flue extender and the external surface of the second horn extender.

An ultrasonic surgical apparatus, comprising:

• an ultrasonic horn having an external surface;
• a flue having an internal surface, wherein the flue is configured to be disposed about the external surface of the ultrasonic horn, and wherein the internal surface includes an arcuate region and a plurality of protrusions, wherein the plurality of protrusions are distributed at locations that correspond to locations on or near a node of the ultrasonic horn, and wherein the plurality of protrusions form a bridge that limits contact between the arcuate region of the internal surface of the flue and the external surface of the ultrasonic horn.

A flue for use with an ultrasonic horn comprising:

• an internal surface extending between a proximal end and an opposing distal end;
• a first flue extender and a second flue extender, wherein the second flue extender extends distally from the first flue extender;
• the internal surface of each one of the first flue extender and the second flue extender includes an arcuate region defining a first inner diameter and a plurality of protrusions projecting inwardly from the arcuate region defining a second inner diameter, wherein the second inner diameter is smaller than the first inner diameter;