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Retractable safety penetrating instrument for portal sleeve introduction

  • US 5,591,193 A
  • Filed: 05/10/1995
  • Issued: 01/07/1997
  • Est. Priority Date: 11/27/1991
  • Status: Expired due to Fees
First Claim
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1. A retractable safety penetrating instrument for forming a portal communicating with a cavity in the body to allow passage of instruments for performing least invasive medical procedures comprisinga hollow portal sleeve for providing a passage through a cavity wall and having a distal end for positioning in the body cavity, a proximal end for positioning externally of the body cavity and a lumen extending between said distal and proximal ends;

  • a housing mounting said proximal end of said sleeve;

    means for permitting said portal sleeve to move proximally relative to said housing in housing in response to a proximal force from tissue contact at said distal end of said portal sleeve during penetration of the cavity wall and to move distally relative to said housing in response to removal of the proximal force upon entry of said distal end of said portal sleeve in the body cavity;

    a penetrating member insertable through said housing to be disposed in said lumen of said sleeve and having a distal end for penetrating the cavity wall and a proximal end, said penetrating member being withdrawable from said housing and said sleeve following introduction of said sleeve in the body cavity;

    retracting means for moving said penetrating member proximally relative to said sleeve from an extended position where said distal end of said penetrating member protrudes beyond said distal end of said sleeve to a retracted position to prevent contact of said distal end of said penetrating member with tissue; and

    trigger means including an operating member extending proximally from said proximal end of said sleeve and being movable proximally therewith during penetration of the cavity wall and being movable distally therewith upon entry of said distal end of said sleeve in the body cavity, said trigger means including a trigger disposed proximally of said sleeve for being engaged by said operating member when said sleeve moves distally, to actuate said retracting means to move said penetrating member to said retracted position upon said distal end of said sleeve entering the body cavity.

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