Four blade medical retractor

摘要

A four blade medical retractor for holding open a body or surgical cavity. A first blade is fixedly mounted to the first leg of an L-shaped frame. A second blade is slidably mounted to the second leg of the frame and includes a spring biased pawl to control motion of the second blade relative to the first blade. A third blade is slidably mounted to the first leg and also includes a pawl to control motion of the third blade along the first leg. A carrier mounted to the second leg holds a fourth blade which is movable both along the length of the second leg and also to and from the third blade.