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Method for removing cellular material with endoscopic ultrasonic aspirator

  • US 4,922,902 A
  • Filed: 12/16/1987
  • Issued: 05/08/1990
  • Est. Priority Date: 05/19/1986
  • Status: Expired due to Term
First Claim
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1. A method of removing cellular material from a compliant tissue relatively deep within a biological body through a narrow orifice comprising:

  • providing an elongated surgical instrument which comprises an elongated working end having a length of at least about 8 cm, a circumference of no more than about 29 mm, and a working tip at the forward end thereof, said instrument including means for viewing said working tip and said material to be removed;

    inserting said forward end of said elongated surgical instrument into the orifice with said working tip located close to the material to be removed; and

    vibrating said working tip longitudinally at a frequency of about 10-20 kHz so as to cavitate the intracellular fluids in such material to destroy the cells thereof while monitoring the removal of said material through the viewing means of said instrument.

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