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Retractable safety penetrating instrument for portal sleeve introduction

  • US 5,478,317 A
  • Filed: 06/03/1994
  • Issued: 12/26/1995
  • 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 penetrating member disposed in said lumen of said sleeve and having a distal end for penetrating the cavity wall and a hollow proximal end;

    a hub mounting said proximal end of said penetrating member and having proximal wall;

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

    a guide tube secured to said hub and extending from said hub proximal wall into said penetrating member proximal end for guiding proximal movement of said penetrating member therealong; and

    trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said retractable safety penetrating instrument distally upon said sleeve distal end entering the body cavity whereby said distal end of said penetrating member is protected from inadvertent contact with tissue in the body cavity.

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