Trocar for penetration and skin incision

Details Trocar for penetration and skin incision Trocar for penetration and skin incision

1997-09-19

1999-05-18

Buiz, Michael

Surgery

Instruments

Cutting, puncturing or piercing

604164, A61B17/34

Patent

active

059046996

ABSTRACT:
A trocar which has an obturator assembly for establishment of a surgical port for endoscopic or arthroscopic surgery is disclosed. The obturator includes a flat cutting blade, a shield that moves proximally and distally, a precock lever to move the shield proximally to expose the flat cutting blade, and a shield retaining assembly to constrain the shield in the proximal position. "Precocking" the trocar moves the shield from the distal position wherein the flat blade is covered, to a proximal position wherein the flat blade is exposed, and the shield is constrained by the shield retaining assembly. The exposed flat cutting blade of the precocked trocar can be used to incise or pierce tissue, thus avoiding the need to use a separate surgical sharp.

REFERENCES:
patent: 4535733 (1985-08-01), Honda
patent: 4539976 (1985-09-01), Sharpe
patent: 5314417 (1994-05-01), Stephens et al.
patent: 5323765 (1994-06-01), Brown
patent: 5350393 (1994-09-01), Yoon
patent: 5364372 (1994-11-01), Danks et al.
patent: 5431635 (1995-07-01), Yoon
patent: 5522833 (1996-06-01), Stephens et al.
patent: 5571134 (1996-11-01), Yoon
patent: 5591190 (1997-01-01), Yoon
patent: 5607440 (1997-03-01), Danks et al.
patent: 5609604 (1997-03-01), Schwemberger et al.

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