Ultrasonic knife
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United States of America Patent
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Aug 30, 1994
Issued Date -
N/A
app pub date -
Apr 29, 1993
filing date -
Feb 20, 1992
priority date (Note) -
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Abstract
Disclosed is an improved ultrasonic knife of the type for surgical incision in various types of tissue and/or for the removal of cement within the body. The knife has a reduced thermal footprint to minimize thermally induced tissue damage. 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. Methods utilizing the foregoing apparatus are also disclosed.
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