ABDOMINAL RETRACTOR

摘要

An adjustable retractor (30) is disclosed comprising an inner ring (32), an outer ring (34) spaced from the inner ring (32), and an elongate sleeve (36) open at opposite ends. The sleeve (36) is provided and extends between the inner and outer rings (32,34) and is connected at the opposite ends to the rings (32,34). The outer ring (34) is provided with a pre-loaded rotational torque to assist with rotation of the outer ring (34) about its central axis to roll the sleeve (36) about the outer ring (34) to adjust sleeve (36) length. The outer ring (34) may be formed in a mobius configuration to provide the pre-loaded rotational torque. The outer ring (34) has a cross-sectional shape that may have numerous different configurations. The mobius configuration may include the cross-sectional shape having an outer circumference offset by a predetermined amount about the central axis of the outer ring (34) proceeding longitudinally along the central axis from one location on the outer ring (34) to another location on the outer ring (34).