Patent ID: 8758236
Filing Date: 2014-06-24
Classification: A61B

Abstract:
1. A retraction device for retracting an incision in a body wall, the retraction device comprising: a first, outer ring; a second, inner ring; a first hinge coupling the first, outer ring to the second, inner ring; a second hinge coupling the first, outer ring to the second, inner ring, the first and second hinges being positioned along a common axis and substantially opposite each other on the circumference of the first and second rings; a tubular sheath coupled around the circumference of the first, outer ring and around the circumference of the second, inner ring; a first, concentric state in which the first, outer ring and the second, inner ring are substantially concentric with each other; a second, angular state in which the first, outer ring and second, inner ring are rotated about the axis and form an angle between the planes of the first and second rings; and means for maintaining the retraction device in the second, angular state, wherein the sheath is substantially cylindrical when the first and second rings are in the second, angular state.