A foerster clamp is a surgical clamp with a round eyelet.^[1] Also known as a sponge clamp, or sponge stick. Used for atraumatically grasping lung tissue in thoracic surgery. When grasping a surgical sponge in the jaws, Foerster clamps are commonly used for removing small amounts of fluids from the operative area and applying pressure to sites of bleeding.^[1] May also be used for tissue dissection. Invented by David William Foerster of Oklahoma City, Oklahoma, who pioneered sex change operations in the United States.