The self-retaining vaginal retractor comprises an inverted-U-shaped slotted base plate. A top and pair of cooperating side vagina retracting blades are selectively, removably and adjustably secured to the base plate. Each blade comprises a curved tongue portion and an integral slotted handle portion....http://www.google.com/patents/US6342036?utm_source=gb-gplus-sharePatent US6342036 - Self-retaining vaginal retractor
