Retractable safety penetrating instrument for portal sleeve introduction

• US 5,607,396 A
• Filed: 05/10/1995
• Issued: 03/04/1997
• Est. Priority Date: 11/27/1991
• Status: Expired due to Fees

• Current Assignee: Inbae Yoon
• Original Assignee: Inbae Yoon
• Inventors: Yoon, InBae
• Primary Examiner(s): RIMELL, SAMUEL G
• Application Number:
  US08/438,578
• Time in Patent Office: 664 Days
• Field of Search: 604/157, 604/158, 604/164, 604/165, 604/167, 604/264, 604/274, 606/185
• US Class Current: 604/165.02
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/3474 Insufflating needles, e.g. Veress needles
• CPC Class Codes: A61B 17/3496 Protecting sleeves or inner probes; Retractable tips for protecting body piercing guide needles A61M25/0612
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61B 2090/08021 of the patient or his organs

Abstract

A retractable safety penetrating instrument for introducing a portal sleeve into a cavity in the body includes a portal sleeve and a penetrating member disposed within the portal sleeve and supported in a manner to automatically move proximally from an extended position wherein a sharp distal end of the penetrating member protrudes from the portal sleeve to a retracted position wherein the sharp distal end of the penetrating member is protected in response to distal movement of the retractable safety penetrating instrument upon penetration into a cavity in the body. A retracting mechanism moves the penetrating member proximally and is normally locked in a position preventing proximal movement of the penetrating member and is released by distal movement of an operating member to trigger reaction of the penetrating member.

Claims

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 comprising

a 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 proximal end and a distal end portion having a distal end for penetrating the cavity wall;

a hub mounting said proximal end of said penetrating member;

a middle member disposed between said penetrating member and said portal sleeve and having a proximal end secured in said hub and a distal end disposed within said portal sleeve;

means for biasing said penetrating member distally to an extended position where said distal end of said penetrating member is disposed distally of said sleeve distal end and for permitting movement of said penetrating member proximally from said extended position against said distal bias in response to a proximal force from tissue contact at said distal end of said penetrating member during penetrating of the cavity wall;

a neck on said distal end portion of said penetrating member for engaging said distal end of said middle member when said penetrating member moves proximally against said distal bias for providing a positive stop limiting proximal movement of said penetrating member during penetration of the cavity wall;

retracting means for moving said penetrating member proximally relative to said sleeve 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; and

trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said penetrating member distally by said distal bias upon removal of the proximal force from tissue contact upon entry into the anatomical cavity whereby said distal end of said penetrating member is protected from inadvertent contact with tissue in the body cavity.