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Method and apparatus for minimally invasive tissue removal

  • US 5,685,840 A
  • Filed: 06/07/1995
  • Issued: 11/11/1997
  • Est. Priority Date: 02/16/1993
  • Status: Expired due to Term
First Claim
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1. A tissue morcellator 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 end and a distal end, said cannula supported by said handpiece at said proximal end and having a tissue introduction opening at said distal end and further having an end surface at said distal end facing said introduction opening;

    a tubular drive shaft connected to said motor and extending through said cannula to said introduction opening; and

    a tissue impactor engaged to said drive shaft and having an impacting surface arranged to oppose said end surface of said cannula, whereby tissue extending into said introduction opening is disposed between said end surface and said impacting surface as said impactor is reciprocated by said motor.

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