Trocar with rotating safety shield

Details Trocar with rotating safety shield Trocar with rotating safety shield

1993-03-30

1994-11-22

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 5178

Patent

active

053664450

ABSTRACT:
A trocar (2) includes a hollow body (4) defining a path between its proximal and distal ends with an obturator assembly (6) positioned along the path. The distal and (22) of the obturator rod (14) has a cutting element or blade (24). A safety shield (46) is rotably mounted to the blade for automatic movement from a cutting position, with the blade exposed, and a safe position, with the blade shielded, when the blade is at least partially through the tissue layer being pierced. A gas sealing assembly (114) seals the path along the trocar body and includes at least three interleavened elastomeric sealing elements (124) which seal the path when an object, such as an obturator barrel ( 14) , is not positioned along the path.

REFERENCES:
patent: 3994287 (1976-11-01), Turp et al.
patent: 4177814 (1979-12-01), Knepshield et al.
patent: 4430081 (1984-02-01), Timmermans
patent: 4601710 (1986-07-01), Moll
patent: 4610665 (1986-09-01), Matsumoto et al.
patent: 4623343 (1986-11-01), Thompson
patent: 4654030 (1987-03-01), Moll et al.
patent: 4902280 (1990-02-01), Lander
patent: 4931042 (1990-06-01), Holmes et al.
patent: 5041095 (1991-08-01), Littrell
patent: 5053016 (1991-10-01), Lander
patent: 5057084 (1991-10-01), Ensminger et al.
patent: 5066288 (1991-11-01), Deniega et al.
patent: 5098405 (1992-03-01), Peterson et al.
patent: 5127626 (1992-07-01), Hilal et al.
patent: 5141498 (1992-08-01), Christian
patent: 5167636 (1992-12-01), Clement
patent: 5197955 (1993-03-01), Stephens et al.
patent: 5226426 (1993-07-01), Yoon

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