Automatic retractable trocar with safety shield and method of us

Details Automatic retractable trocar with safety shield and method of us Automatic retractable trocar with safety shield and method of us

1992-04-15

1994-06-14

Mancene, Gene

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

A61M 5178

Patent

active

053206100

ABSTRACT:
An automatic retractable safety trocar instrument includes a portal sleeve, a trocar disposed within the portal sleeve and a safety shield disposed between the portal sleeve and the trocar. The trocar is movable automatically from an operative position wherein a sharp distal end of the trocar protrudes from the portal sleeve to a retracted position wherein the sharp distal end is protected within the instrument upon penetration into a cavity in the body. The safety shield is automatically movable proximally from an extended position during penetration of tissue and distally toward the extended position upon introduction of a distal end of the portal sleeve in an anatomical cavity such that a distal end of the safety shield contacts tissue within the cavity and moves the tissue away from the cavity wall. A method of creating a space between a wall of an anatomical cavity and a layer of tissue within the cavity includes penetrating the cavity wall with the sharp tip of a penetrating member disposed within a portal sleeve to position a distal end of the portal sleeve within the cavity and extending a safety shield to protrude beyond the sharp tip and the cavity wall whereby a blunt distal end of the safely shield moves the tissue away from the wall maintaining a space between the tissue and the wall.

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