Surgery – Instruments – Cutting – puncturing or piercing
Patent
1994-08-12
1997-12-09
Lewis, William
Surgery
Instruments
Cutting, puncturing or piercing
30355, A61B 1732
Patent
active
056955103
ABSTRACT:
Disclosed is an improved ultrasonic knife of a type for incising various types of material. The knife has a reduced thermal footprint to tailor thermally induced tissue effects. Tooth configuration on the knife cooperates with the stroke of the ultrasonic drive to produce efficient cutting, as well as tactile feedback to the surgeon with respect to the rate of cutting, and changes in tissue density. Ultrasonic knife tip extenders are also disclosed for advancing the ultrasonic knife tip through the working channel of an endoscope or trocar sheath. Methods utilizing the foregoing apparatus are also disclosed.
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