A Penrose drain is a surgical device, named for the American gynecologist Charles Bingham Penrose (1862–1925), placed in a wound to drain fluid. It consists of a soft rubber tube placed in a wound area, to prevent the build up of fluid.
A Penrose drain removes fluid from a wound area. Frequently it is put in place by a surgeon after a procedure is complete to prevent the area from accumulating fluid, such as blood, which could serve as a medium for bacteria to grow in.
In podiatry, a Penrose drain is often used as a tourniquet during a hallux nail avulsion procedure or ingrown toenail extraction.
It can also be used to drain cerebrospinal fluid to treat a hydrocephalus patient.