drainage

(dra'nej). The continuous withdrawal of pus and other fluids from a wound or other cavity. cap'illary d., d. by means of a wick of gauze, horsehair, or other material, through d., d. obtained by the pa age of a perforated tube, open at both extremities, through a cavity; in addition to providing for the escape of fluids, this allows for the washing out of the cavity by the forcing of water through the tube.