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Biopsy device

  • US 9,775,588 B2
  • Filed: 09/30/2014
  • Issued: 10/03/2017
  • Est. Priority Date: 12/20/2007
  • Status: Active Grant
First Claim
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1. A biopsy device comprising:

  • a pressure chamber having a body having a distal end, a proximal end, and an inner wall, wherein the proximal end includes an inlet;

    at least one first recessed area extending along the inner wall of the body, proximate the proximal end of the body of the pressure chamber, wherein the first recessed area is configured to release pressure within the pressure chamber;

    at least one second recessed area extending along the inner wall of the body, proximate the distal end of the body of the pressure chamber, wherein the second recessed area is configured to release pressure within the pressure chamber;

    a piston configured to engage the inner wall of the pressure chamber;

    a cannula coupled to the pressure chamber for taking a tissue sample from a patient, the cannula defining a tissue chamber; and

    a fluid receptacle interposed between the tissue chamber and the pressure chamber, the fluid receptacle having an absorbent material to absorb a fluid,wherein the at least one first recessed area proximate the proximal end of the pressure chamber is configured to release a positive pressure within the pressure chamber.

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