Ultrasonic soft tissue cutting and coagulation systems having multiple superposed vibrational modes
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United States of America Patent
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Issued Date -
Nov 13, 2003
app pub date -
May 13, 2003
filing date -
May 13, 2002
priority date (Note) -
Abandoned
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Abstract
Ultrasonic soft tissue cutting or coagulating systems are featured in which multiple modes of vibration can be used simultaneously in order to vibrate an ultrasonic member, whose vibrational motion is a harmonic superposition of a plurality of modes of vibrations. Non-longitudinal modes of vibration, i.e. vibratory modes for which the direction of the vibrational motion includes at least one component that is non-parallel to the longitudinal axis of the vibrating element are excited, are stimulated. In one embodiment, a single source may excite the multiple modes of vibration that forms the composite vibratory motion. The multiple modes may include, but are not limited to, transverse, rotational, extensional, bending, and flexural modes of vibration.
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