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Removal of tissue

  • US 6,007,513 A
  • Filed: 09/05/1997
  • Issued: 12/28/1999
  • Est. Priority Date: 07/17/1990
  • Status: Expired due to Fees
First Claim
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1. A method comprising the steps of:

  • inserting a fragmenting tip having fragmenting surfaces through an opening in an eye into a lens of the eye having a cataract and a capsular wall wherein the tip has at least one movable fragmenting surface;

    moving the fragmenting surface in a first direction and in at least a second direction;

    the step of moving the fragmenting surface in a first direction including the step of rotating the fragmenting surface at a first value of cycles per second sufficient to twist fibrous material until said fibrous material fails; and

    the step of moving the fragmenting surface in a second direction including the step of reciprocating the fragmenting surface at a second value of cycles per second sufficient to cause cavitation of hydrated material;

    said second value being different than the first value and being in the ultrasonic frequency range.

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