CPC A61N 7/022 (2013.01) [A61B 17/22012 (2013.01); A61B 17/320068 (2013.01); A61B 2017/22079 (2013.01); A61B 2017/32007 (2017.08); A61B 2017/32008 (2013.01); A61B 2017/320069 (2017.08); A61B 2017/320084 (2013.01); A61B 2217/007 (2013.01); A61B 2218/002 (2013.01); A61B 2218/007 (2013.01)] | 20 Claims |
1. A flue for an ultrasonic surgical apparatus, comprising:
an internal surface, wherein the internal surface includes an arcuate region and a plurality of protrusions, wherein the plurality of protrusions form a bridge that limits contact with the arcuate region of the internal surface of the flue, and wherein the plurality of protrusions are distributed in staggered rows and columns such that one protrusion is centered in relation to every four adjacent protrusions arranged in a substantially square or rectangular manner; and
a first flue extender portion and a second flue extender portion extending distally from the first flue extender portion, and wherein the second flue extender portion has a higher density of the plurality of protrusions than the first flue extender portion.
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