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Method and apparatus for minimally invasive tissue removal

  • US 5,643,304 A
  • Filed: 06/07/1995
  • Issued: 07/01/1997
  • Est. Priority Date: 02/16/1993
  • Status: Expired due to Term
First Claim
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1. A surgical rasp for use in percutaneous tissue removal, comprising:

  • a handpiece;

    a motor supported by said handpiece having means for producing linearly reciprocating motion;

    an elongated cannula sized for introduction into the body, said cannula having a proximal and a distal end, said cannula supported by said handpiece at said proximal end and having a cutting opening at said distal end;

    a tubular drive shaft connected to said motor and extending through said cannula to said cutting opening, said drive shaft defining and irrigation channel therethrough;

    means for connecting said irrigation channel to a source of irrigation fluid to flow through said irrigation channel; and

    a rasp blade mounted to said drive shaft, said rasp blade including a plurality of teeth and defining several apertures between said teeth communicating with said irrigation channel, wherein said rasp blade is slidably disposed within said cannula at said distal end with said plurality of teeth extending through said cutting opening.

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