Safety trocar

Details Safety trocar Safety trocar

1996-06-04

1997-11-25

Dawson, Glenn

Surgery

Instruments

Cutting, puncturing or piercing

604264, A61B 1734

Patent

active

056906633

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 conical in profile and contains a slot which conforms to the geometry of the cutting tip. The obturator tip contains a knife edge blade which extends the length of the cannula inner diameter. Ideally, the knife is made of an amorphous metal, and may be serrated at its edge. In one embodiment, the knife edge is contacted directly to a portion of the safety shield.

REFERENCES:
patent: 5263937 (1993-11-01), Shipp
patent: 5275583 (1994-01-01), Crainich
patent: 5314417 (1994-05-01), Stephens et al.
patent: 5350393 (1994-09-01), Yoon
patent: 5411515 (1995-05-01), Haber et al.

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