Trocar

Details Trocar Trocar

1992-02-20

1993-11-16

Hirsch, Paul J.

Surgery

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

Treating material introduced into or removed from body...

604170, 604274, A61M 532, A61M 500

Patent

active

052618919

ABSTRACT:
A safety trocar is provided which includes a spring-loaded shield that shields the cutting tip of the obturator after the obturator penetrates tissue. The distal end of the shield is hemispheric in profile and contains slides within cutting tip. The rounded distal end enables the shield to spring forward to shield the cutting tip as soon as the tip perforates the tissue. In other embodiments, positive mechanical means effect shielding.

REFERENCES:
patent: 2623521 (1952-12-01), Shaw
patent: 4168699 (1979-09-01), Hauser
patent: 4177814 (1979-12-01), Knepshield et al.
patent: 4356826 (1982-11-01), Kubota
patent: 4535773 (1985-08-01), Yoon
patent: 4601710 (1986-07-01), Moll
patent: 4653475 (1987-03-01), Seike et al.
patent: 4654030 (1987-03-01), Moll et al.
patent: 4850973 (1989-07-01), Jordan et al.
patent: 4869717 (1989-09-01), Adair
patent: 4902280 (1990-02-01), Lander
patent: 4919653 (1990-04-01), Martinez et al.
patent: 4931042 (1990-06-01), Holmes et al.
patent: 4940458 (1990-07-01), Cohn
patent: 5104382 (1992-04-01), Brinkerhoff et al.
patent: 5116353 (1992-05-01), Green

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