Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1987-12-16
1990-05-08
Hindenburg, Max
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
604 27, 606168, A61B 1700
Patent
active
049229028
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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Brendolan Robert
Katz Louis
Krawitt Donald R.
Wuchinich David G.
Citrin Randy
Hindenburg Max
Valleylab Inc.
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