Trocar seal system
A seal assembly for reception of an elongated surgical instrument is provided which includes a body having at least one opening configured and dimensioned to permit entry of an elongated surgical instrument and defining a central longitudinal axis; a seal member formed of a resilient material and defining an aperture therein, the aperture being configured and dimensioned such that insertion of the surgical instrument into the aperture causes the resilient material defining the aperture to resiliently contact the outer surface of the surgical instrument in a substantially fluid tight manner; and a fabric layer juxtaposed relative to the resilient material. A coating may be applied to the seal member to reduce friction between the seal member and surgical instrumentation inserted therein. The coating is preferably a hydrocyclosiloxane membrane prepared by plasma polymerization process.
1. A surgical access device for permitting access to body tissue, which comprises:
a seal housing assembly;
a first seal positioned within the seal housing assembly and including a proximal face and a distal face, the first seal including a resilient material and comprising at least one polymeric surface and at least one fabric surface positioned in juxtaposition with the at least one polymeric surface, the first seal including inner portions defining a first aperture extending therethrough and being adapted to expand from a first open condition to an expanded second open condition upon insertion of a surgical object, the inner portions of the first seal engaging the surgical object in the second open condition to establish a substantially fluid-tight seal therewith;
a second seal positioned within the seal housing assembly distally of the first seal, the second seal including a substantially planar configuration and inner portions defining a second aperture extending therethrough, the second aperture being larger than the first aperture of the first seal;
a cannula assembly extending distally from the seal housing assembly along a longitudinal axis, the cannula assembly being configured and dimensioned for introduction into body tissue and including a longitudinal passage configured and dimensioned to permit insertion of the surgical object; and
a third seal positioned within the cannula assembly, the third seal being configured and dimensioned to substantially inhibit communication of fluid therethrough in the absence of the surgical object, wherein the at least one fabric surface is configured as at least one layer of fabric material embedded within the first seal, and the resilient material comprises at least two layers of resilient material, the at least one layer of fabric material being at least partially positioned between the at least two layers of resilient material.
2. The surgical access device of claim 1 , wherein the first seal is non-inflatable.
3. The surgical access device of claim 1 , wherein the seal housing assembly is detachably mounted to the cannula assembly.
4. The surgical access device of claim 1 , wherein the layer of fabric material is positioned adjacent to at least one of the proximal and distal faces of the first seal.
5. The surgical access device of claim 1 , wherein at least one of the first seal, the second seal, and the third seal includes a coating to reduce friction with the surgical object upon insertion.
6. The surgical access device of claim 5 , wherein the coating includes a hydrocyclosiloxane membrane.