Surgery – Instruments – Cutting – puncturing or piercing
Patent
1996-03-06
1997-10-07
Dawson, Glenn
Surgery
Instruments
Cutting, puncturing or piercing
604264, 606167, A61B 1734
Patent
active
056742371
ABSTRACT:
A safety trocar device is described which has an internal safety shield within the obturator of the trocar. The internal safety shield is spring loaded to extend in the distal direction to cover the cutting tip of the trocar obturator. In one embodiment, the trocar obturator is made with a three-sided pyramidal cutting tip and the safety shield has three distally extending fingers which extend through openings in the faces of the pyramidal cutting tip. The safety shield with its three distally extending fingers is preferably rounded to an ellipsoidal shape on the distal end to facilitate penetration of the tissues and to reduce frictional resistance to deployment of the safety shield. The obturator and the safety shield are part of a trocar assembly which also includes a shaft and a proximal handle. Optionally, the trocar assembly may also include a safety locking mechanism which prevents premature or unintended withdrawal of the safety shield. The safety mechanism trocar can be used as a stand-alone trocar device or used in conjunction with an access cannula. The safety trocar is safer and more effective in use because the internal safety shield actuates to shield the sharp point of the obturator immediately upon penetrating the body tissue and entering a body cavity.
REFERENCES:
patent: 4535773 (1985-08-01), Yoon
patent: 4601710 (1986-07-01), Moll
patent: 4654030 (1987-03-01), Moll et al.
patent: 4931042 (1990-06-01), Holmes et al.
patent: 5030206 (1991-07-01), Lander
patent: 5066288 (1991-11-01), Deniega et al.
patent: 5104382 (1992-04-01), Brinkerhoff et al.
patent: 5114407 (1992-05-01), Burbank
patent: 5116353 (1992-05-01), Green
patent: 5152754 (1992-10-01), Plyley et al.
patent: 5215526 (1993-06-01), Deniega et al.
patent: 5224952 (1993-07-01), Deniega et al.
patent: 5242427 (1993-09-01), Bilweis
patent: 5248298 (1993-09-01), Bedi et al.
patent: 5261891 (1993-11-01), Brinkerhoff et al.
patent: 5267965 (1993-12-01), Deniega
patent: 5295993 (1994-03-01), Green
patent: 5314417 (1994-05-01), Stephens et al.
patent: 5318585 (1994-06-01), Guy et al.
patent: 5399167 (1995-03-01), Deniega
patent: 5522833 (1996-06-01), Stephens et al.
patent: 5562696 (1996-10-01), Noldes et al.
patent: 5569291 (1996-10-01), Privitera et al.
patent: 5569292 (1996-10-01), Scweinberger et al.
patent: 5591192 (1997-01-01), Privitera et al.
Dawson Glenn
Leary James J.
LandOfFree
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