Vibration apparatus preferably for endoscopic ultrasonic aspirat

Details Vibration apparatus preferably for endoscopic ultrasonic aspirat Vibration apparatus preferably for endoscopic ultrasonic aspirat

1987-02-27

1988-06-14

Howell, Kyle L.

Surgery

Truss

Pad

604 22, 604 27, A61B 1700

Patent

active

047504889

ABSTRACT:
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.

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