Patent ID: 7727146

Claim:
A wound retractor adapted to retract a surgical incision in a biological body wall to a desired diameter, comprising: a double-tube outer ring having an annular axis, the double-tube outer ring including a first circular tube and a second circular tube that are separated axially, each of the circular tubes including a lumen, the outer ring being adapted for juxtaposition with an outer surface of the body wall and for disposition relative to the incision in the body wall; an inner ring, the inner ring being adapted for juxtaposition with an inner surface of the body wall and for disposition relative to the incision in the body wall; a distensible sleeve coupling the outer ring to the inner ring, the sleeve being adapted to traverse the incision in the body wall; a first substantially noncompliant, split hoop positioned in the lumen of the first circular tube; and a second substantially noncompliant, split hoop positioned in the lumen of the second circular tube, wherein, the outer ring being adapted to roll over itself and around the annular axis to roll the sleeve around the outer ring.