Trocar seal system
View Patent ↗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 seal assembly of a surgical cannula facilitating access to body tissue, the cannula defining a longitudinal axis, the seal assembly comprising:
a housing;
a first member operatively connected to the housing, and including a resilient material positioned generally transversely relative to a longitudinal axis of the cannula, the first member including a proximal face and a distal face, the first member 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;
a first fabric material positioned adjacent to the distal face of the first member;
a second fabric material positioned adjacent to the proximal face of the first member; and
a second member operatively connected to the housing, the second member forming a seal defining a second aperture extending therethrough.
2. The seal assembly of claim 1 , wherein the first member is a seal member.
3. The seal assembly of claim 2 , wherein a portion of the first member that defines the first aperture expands around and engages an outer surface of the surgical object in the second open condition to substantially prevent the passage of fluid therethrough.
4. The seal assembly of claim 1 , wherein the first fabric material is a layer of fabric.
5. The seal assembly of claim 1 , wherein the first fabric material is in direct contact with the distal face of the first member.
6. The seal assembly of claim 1 , wherein the first fabric material is cured into the distal face of the first member.
7. The seal assembly of claim 1 , wherein the first fabric material is compressed into the distal face of the first member.
8. The seal assembly of claim 1 , wherein the second member is positioned distally of the first member.
9. The seal assembly of claim 1 , wherein the first fabric material is disc-shaped.
10. The seal assembly of claim 1 , further comprising a coating to reduce friction.