Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1996-12-12
1998-08-11
Brown, Michael A.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604256, A61M 2902
Patent
active
057921130
ABSTRACT:
A universal seal for a trocar is disclosed. The universal seal has a rigid housing with a chamber for receiving a sealing assembly. The sealing assembly is disposed within the chamber and has freedom of movement along the longitudinal axis of the housing in response to a surgical instrument being inserted into or withdrawn from the sealing assembly. The sealing assembly includes first and second rigid rings generally parallel to and spaced from each other. It also includes an inner elastomeric seal for sealing against instruments of varying diameter. The inner elastomeric seal is attached to the second ring, and it has an aperture for passage of an instrument through the elastomeric seal. In response to off-centered insertion of an instrument into the universal seal, the sealing assembly moves longitudinally and assumes a tilted orientation as the radial force on the inner elastomeric seal is applied by the instrument. The aperture of the inner elastomeric seal consequently moves laterally in response to the off-centered insertion, thus preventing the aperture from stretching significantly or tearing. Therefore, the sealing assembly of the universal seal reduces the escape of insufflation gases from the surgical site through the seal when instruments over a very wide range of diameters are inserted into or withdrawn from the seal.
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Chow Hector
Kramer Francis J.
Brown Michael A.
Ethicon Endo-Surgerym Inc.
Goodwin Matthew S.
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