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Biopsy apparatus

  • US 8,277,393 B2
  • Filed: 05/18/2004
  • Issued: 10/02/2012
  • Est. Priority Date: 11/06/2000
  • Status: Expired due to Term
First Claim
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1. A tissue cutting device comprising:

  • an outer cannula defining an outer lumen and a tissue-receiving opening adjacent a distal end of said outer cannula communicating with said outer lumen;

    an inner cannula slidably disposed within said outer lumen defining an inner lumen from an open distal end to an open opposite proximal end, said inner cannula defining a cutting edge at said open distal end operable to sever tissue projecting through said tissue-receiving opening, wherein the inner cannula is configured such that said severed tissue entering the tissue-receiving opening can be aspirated through the inner lumen, and completely through a handpiece;

    a rotary motor operably coupled to said inner cannula and configured to rotate said inner cannula within said outer lumen;

    a tubular axle for supporting said rotary motor for movement with said inner cannula; and

    a linear motor operably coupled to said tubular axle and configured to axially reciprocate said rotary motor, and thereby said inner cannula, while said rotary motor rotates said inner cannula;

    wherein the tubular axle is configured such that said severed tissue entering the tissue-receiving opening can be aspirated linearly from a distal most end of the tubular axle, completely through and exit out of a proximal most end of the tissue cutting device and the tubular axle.

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