04750488 is referenced by 169 patents and cites 48 patents.

A method and apparatus for endoscopic removal of compliant biological tissues utilizing an endoscopic ultrasonic aspirator comprising irrigation and aspiration means, a piezoelectric ultrasonic transducer, a first resonator such as a half-wave stepped velocity transformer, a probe including a second resonator such as a constant-stress velocity transformer, a blunt or modified working tip of open channel means or restricted tubular means for application of ultrasonic energy to cellular material, and a capacitive fluid sensor to detect the presence of irrigation fluid adjacent these transformers within the instrument. The surgery is advantageously performed by operating the transducer in the 10-20 kHz range to achieve maximum cavitation of the intracellular fluids in the tissues to be removed.

Title
Vibration apparatus preferably for endoscopic ultrasonic aspirator
Application Number
770342
Publication Number
4750488
Application Date
February 27, 1987
Publication Date
June 14, 1988
Inventor
Louis Katz
Flushing
NY, US
Robert Brendolan
Mamaroneck
NY, US
Donald R Krawitt
Rhinebeck
NY, US
David G Wuchinich
New York
NY, US
Agent
Pennie & Edmonds
Assignee
Sonomed Technology
NY, US
IPC
A61B 17/00
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