Patent ID: 8636658
Filing Date: 2014-01-28
Classification: A61B

Abstract:
1. A surgical retractor comprising: an outer ring unit; a tubular retraction membrane made of a resilient material, and including an inner surface defining a passageway, and opposite inner and outer tubular ends, said outer tubular end being connected to said outer ring unit, wherein said outer tubular end can be rolled about said outer ring unit; and a lighting unit attached to said inner tubular end and including a light-emitting ring, and a heat-dissipation ring in contact with said light-emitting ring, wherein said light-emitting ring includes a ring-shaped transparent tube body, and a light source disposed within said transparent tube body, and wherein said heat-dissipation ring includes a looped tube body stacked on said transparent tube body of said light-emitting ring, and a heat-absorbing fluid filled in said looped tube body.