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Safety penetrating instrument having a triggered safety member for establishing an endoscopic portal in an anatomical cavity wall

  • US 5,431,635 A
  • Filed: 06/24/1993
  • Issued: 07/11/1995
  • Est. Priority Date: 12/18/1990
  • Status: Expired due to Fees
First Claim
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1. A safety penetrating instrument for establishing a portal in a wall of an anatomical cavity for performing endoscopic procedures comprisingan elongate, tubular portal sleeve having a distal end for positioning in the anatomical cavity and a proximal end for positioning externally of the anatomical cavity wall;

  • a penetrating member disposed in said portal sleeve having a distal end for penetrating tissue;

    a safety member disposed within said portal sleeve and having a distal end, said safety member being movable relative to said penetrating member and said portal sleeve between an extended position where said safety member distal end protrudes distally from said penetrating member distal end and said portal sleeve distal end and a retracted position where said safety member distal end is disposed proximally of said penetrating member distal end to expose said penetrating member distal end;

    bias means for biasing said safety member to move distally toward said extended position and for permitting said safety member to move proximally toward said retracted position;

    handle means coupled with said safety member for manually moving said safety member proximally relative to said portal sleeve from said extended position to said retracted position;

    locking means for engaging said safety member to prevent distal movement of said safety member from said retracted position to said extended position; and

    releasing means responsive to entry of said safety penetrating instrument into the anatomical cavity for triggering release of said locking means to permit said bias means to move said safety member to said extended position.

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