Trocar with safety sensing sleeve

Details Trocar with safety sensing sleeve Trocar with safety sensing sleeve

1993-03-17

1995-10-31

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

606185, A61B 1734

Patent

active

054625327

ABSTRACT:
A trocar assembly is provided wherein the obturator having a piercing tip and a sleeve around said obturator are housed within the trocar cannula. In the extended position the obturator tip and a portion of the distal end of the sleeve extend from the distal end of the cannula. During insertion of the obturator tip, sleeve and cannula into tissue, the force of tissue as the obturator penetrates the tissue which surrounds the exposed sleeve sensitizes the sleeve. At the proximal end of the sleeve a triggering mechanism is provided whereby upon release of the force of the sleeve at its distal end upon penetration through the tissue the sensitized sleeve releases to activate the triggering mechanism which retracts the obturator tip into the housing.

REFERENCES:
patent: 4419094 (1983-12-01), Patel
patent: 4730316 (1988-03-01), Desyllas et al.
patent: 5030206 (1991-07-01), Lander
patent: 5066288 (1991-11-01), Deniega et al.
patent: 5114407 (1992-05-01), Burbank
patent: 5116353 (1992-05-01), Green
patent: 5147316 (1992-09-01), Castillenti
patent: 5152754 (1992-10-01), Plyley et al.
patent: 5312354 (1994-05-01), Allen et al.

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