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Pneumatically actuated tissue sampling device

  • US 6,273,861 B1
  • Filed: 09/01/1998
  • Issued: 08/14/2001
  • Est. Priority Date: 01/30/1997
  • Status: Expired due to Term
First Claim
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1. A tissue removing device comprising:

  • head portion;

    a cannula extending from said head portion, said cannula having a proximal end and a distal end;

    a stylet extending from said head portion, said stylet having a proximal end and a distal end, wherein said cannula and said stylet are co-axial with said head portion;

    and said cannula is coaxially disposed about said stylet, said stylet is mounted within said head portion for axial movement relative to said head portion and relative to said cannula between a first, retracted position and a second, extended position; and

    said cannula is mounted within said head portion for axial movement relative to said head portion and relative to said stylet between a first, retracted position and a second, extended position;

    a handle rotatably attached to said head portion, said handle containing a compressed fluid passage;

    means for impelling said stylet toward said second, extended position in response to an impelling force; and

    means for impelling said cannula toward said second, extended position in response to an impelling force, wherein said means for impelling said stylet and said means for impelling said cannula are in fluid communication with a single source of compressed fluid, and wherein fluid from said source of compressed fluid provides the impelling force.

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