Retractable obturator for a trocar

Details Retractable obturator for a trocar Retractable obturator for a trocar

1994-08-29

1996-06-04

Thaler, Michael H.

Surgery

Instruments

Cutting, puncturing or piercing

604164, A61B 1734

Patent

active

055228330

ABSTRACT:
A retractable obturator trocar with a puncturing tip is provided. Preferably the obturator includes a safety shield covering the puncturing tip in an unarmed position and permitting the tip to extend distally from the safety shield in an armed position. The obturator preferably includes a spool retracting mechanism which causes the distally extended obturator to retract into the safety shield when a force is applied to the puncturing tip. The obturator may also be manually disengaged. The safety shield and obturator preferably extend out of the distal end of the cannula whether the trocar is armed or unarmed.

REFERENCES:
patent: 5116353 (1992-05-01), Green
patent: 5256149 (1993-10-01), Banik et al.
patent: 5290243 (1994-03-01), Chodorow et al.
patent: 5290304 (1994-03-01), Storace
patent: 5312354 (1994-05-01), Allen et al.
patent: 5318580 (1994-06-01), Gresi, Jr.
patent: 5318585 (1994-06-01), Guy et al.
patent: 5346459 (1994-09-01), Allen
patent: 5352237 (1994-10-01), Rodak et al.
patent: 5387197 (1995-02-01), Smith et al.
patent: 5417705 (1995-05-01), Haber et al.

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