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Biopsy device with bipolar coagulation capability

  • US 5,085,659 A
  • Filed: 11/21/1990
  • Issued: 02/04/1992
  • Est. Priority Date: 11/21/1990
  • Status: Expired due to Fees
First Claim
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1. A biopsy instrument(a) an elongated flexible plastic tube having a proximal end and a distal end, and a lumen extending therebetween;

  • (b) an insulating anvil, a portion of which is of a first diameter;

    (c) a tubular metal sleeve having an annular edge at one end thereof beveled to a sharp edge and of an inner diameter dimensioned to receive said portion of said anvil with a close tolerance;

    (d) an elongated longitudinally movable rod extending through said lumen from said proximal end of said tube and beyond said distal end of said tube, one of said insulating anvil and said tubular metal sleeve being attached to said rod for movement therewith and the other of said insulating anvil and said tubular sleeve being affixed to said distal end of said tube;

    (e) a conductive electrode affixed to said insulating anvil;

    (f) means mounted on said proximal end of said rod for imparting longitudinal movement to one of said anvil and said sleeve relative to the other of said anvil and said sleeve for drawing said portion of said anvil into said sleeve; and

    (g) means extending through said lumen and electrically coupled to said conductive electrode and said metal sleeve for applying a voltage between said sleeve and said conductive electrode.

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