Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-10-16
1998-01-20
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604164, 606185, A61M 500
Patent
active
057096716
ABSTRACT:
A safety-shielded trocar having an obturator with a linear cutting edge surface defining a base width substantially less than the diameter of the safety shield is disclosed. When the trocar is inserted through tissue, the tissue dilates from the width of the linear incision to accommodate the size of the safety shield of the trocar, thus making it possible to provide an access opening greater than the incisional width made by the linear cutting edge surface of the obturator. In a preferred embodiment, the safety shield has a shield tip region which is asymmetric to facilitate the dilation of the tissue as the trocar is inserted.
REFERENCES:
patent: 4535773 (1985-08-01), Yoon
patent: 5314417 (1994-05-01), Stephens et al.
patent: 5350393 (1994-09-01), Yoon
patent: 5522831 (1996-06-01), Sleister et al.
Powell Darrel
Privitera Salvatore
Schwemberger Richard F.
Stephens Randy R.
Yapp Steven G.
Ethicon Endo-Surgery Inc.
Goodwin Matthew S.
Yasko John D.
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