发明名称 |
Method for removing cellular material with endoscopic ultrasonic aspirator |
摘要 |
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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申请公布号 |
US4922902(A) |
申请公布日期 |
1990.05.08 |
申请号 |
US19870133711 |
申请日期 |
1987.12.16 |
申请人 |
VALLEYLAB, INC. |
发明人 |
WUCHINICH, DAVID G.;KRAWITT, DONALD R.;BRENDOLAN, ROBERT;KATZ, LOUIS |
分类号 |
A61B10/00;A61B10/02;A61B17/22;A61B17/32;A61B18/00;A61B18/14;A61M1/00;B06B1/02 |
主分类号 |
A61B10/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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