Patent ID: 7052454

Claim:
A surgical access device adapted to facilitate access through an incision in a body wall and into a body cavity of a patient, the body wall having an inner surface and an outer surface, the device comprising; a first retention member sized and configured to surround the incision in proximity to the outer surface of the body wall, the first retention member including a hoop with a first end and a second end; a second retention member sized and configured to surround the incision in proximity to the inner surface of The body wall; a membrane extending between the first retention member and the second retention member, the membrane forming a throat adapted for disposition through the incision, the membrane forming a first funnel extending from the first retention member into the throat, and the membrane forming a second funnel extending from the second retention member into the throat; and the throat of the membrane having characteristics for forming an instrument seal in the presence of an instrument and a zero seal in the absence of an instrument; wherein the hoop is provided with a series of ratchet teeth and the first end includes a ratchet pawl.