Apparatus and method for an ultrasonic medical device operating in a torsional mode
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United States of America Patent
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Issued Date -
Aug 25, 2005
app pub date -
Feb 9, 2004
filing date -
Feb 9, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides an apparatus and a method for an ultrasonic medical device operating in a torsional mode to treat a biological material. An ultrasonic probe of the ultrasonic medical device is placed in communication with the biological material. An ultrasonic energy source is activated to produce an electrical signal that drives a transducer to produce a torsional vibration of the ultrasonic probe. The torsional vibration produces a rotation and a counterrotation along the longitudinal axis of the ultrasonic probe that creates a plurality of torsional nodes and a plurality of torsional anti-nodes along a portion of the longitudinal axis of the ultrasonic probe resulting in cavitation along a portion of the longitudinal axis of the ultrasonic probe comprising a radially asymmetric cross section that ablates the biological material.
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