04750902 is referenced by 415 patents and cites 51 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
Endoscopic ultrasonic aspirators
Application Number
770342
Publication Number
4750902
Application Date
May 19, 1986
Publication Date
June 14, 1988
Inventor
Donald R Krawitt
Rhinebeck
NY, US
Louis Katz
Flushing
NY, US
Robert Brendolan
Mamaroneck
NY, US
David G Wuchinich
New York
NY, US
Agent
Pennie & Edmonds
Assignee
Sonomed Technology
NY, US
IPC
A61B 17/20
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