Patent ID: 7815567

Claim:
A surgical access device, comprising: a wound retractor for retracting an opening in a biological body wall, the wound retractor having, an outer ring having an annular axis and adapted for juxtaposition with an outer surface of the biological body wall, an inner ring adapted for juxtaposition with an inner surface of the biological body wall, and a sleeve coupling the outer ring to the inner ring, the sleeve being adapted to traverse the opening in the body wall, wherein the outer ring has a neutral state and a transitional state, in the neutral state, the outer ring is substantially noncompliant, and in the transitional state, the outer ring rolls over itself around the annular axis to roll the sleeve around the outer ring to retract and seal the opening in the body wall; and a gel cap adapted for being coupled to the substantially noncompliant outer ring of the wound retractor, the gel cap having, a cap ring adapted to be coupled to the outer ring of the wound retractor, the cap ring comprising a proximal portion, a distal portion, and a plurality of apertures extending through a wall at the proximal portion of the cap ring, and, a gel pad, wherein portions of the gel pad extend through the plurality of apertures, thereby mechanically coupling the gel pad to the cap ring through the plurality of apertures, the gel pad being made of a gel material, the gel pad including an access portion for providing a passage from external the body to a body cavity, the passage forming an instrument seal in the presence of an instrument inserted therethrough and a zero seal in the absence of an instrument inserted therethrough.