Endoscopic ultrasonic aspirator

Details Endoscopic ultrasonic aspirator Endoscopic ultrasonic aspirator

A - Human Necessities

61

H

326/5

A61H 21/00 (2006.01) A61B 17/22 (2006.01) A61B 18/14 (2006.01) A61M 1/00 (2006.01) B06B 1/02 (2006.01) A61B 10/00 (2006.01) A61B 17/32 (2006.01) A61B 18/00 (2006.01)

Patent

CA 1318000

ABSTRACT OF THE DISCLOSURE 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.

616191

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