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 method of manufacturing a seal for use with a surgical access assembly configured and dimensioned for positioning within a percutaneous tissue tract during a medical procedure, the method comprising the steps of:
positioning a layer of fabric material adjacent a layer of polymeric material;
compressing the layer of fabric material into the layer of polymeric material;
forming the layers of fabric and polymeric materials into a substantially annular member including an aperture extending therethrough configured and dimensioned to receive a surgical instrument in substantially sealed relation; and
curing the polymeric material.
2. The method of claim 1 , further including the step of compressing an amount of polymeric material into a sheet to thereby form the layer of polymeric material before positioning the layer of fabric material adjacent thereto.
3. The method of claim 1 , wherein the positioning step includes positioning a layer of fabric material adjacent a layer of uncured polyisoprene.
4. The method of claim 1 , wherein the forming step includes cutting the layers of fabric and polymeric materials into a circular configuration including an aperture extending therethrough.
5. The method of claim 1 , wherein the curing step includes hot compression molding the layers of fabric and polymeric materials.
6. The method of claim 5 , wherein the curing step includes extruding outer portions of the polymeric material.
7. The method of claim 1 , further including the step of applying a coating to the layer of fabric material.
8. The method of claim 7 , wherein the applying step includes applying hydrocyclosiloxane to the layer of fabric material to form a membrane.
9. A method of manufacturing a seal for use with a surgical access assembly configured and dimensioned for positioning within a percutaneous tissue tract during a medical procedure, the method comprising the steps of:
compressing an uncured polymeric plug into a flat sheet;
calendaring a layer of fabric material into the flat sheet to thereby form a composite;
forming the composite into at least one substantially circular slug including an aperture extending therethrough configured and dimensioned to receive a surgical instrument in substantially sealed relation; and
hot compression molding the composite to cure the polymeric material.
10. The method of claim 9 , wherein the compressing step includes compressing an uncured polyisoprene plug.
11. The method of claim 10 , wherein the hot compression molding step includes extruding outer portions of the polyisoprene.
12. The method of claim 9 , further including the step of applying a coating to the composite.
13. The method of claim 12 , wherein the applying step includes applying hydrocyclosiloxane to the composite.