Abstract: A wound drainage device in the form of a flexible pouch having top and bottom walls and having pleated side walls that allow the top wall to be lifted a limited distance without transmitting appreciable lifting or tensioning forces to the bottom wall when the bottom wall is surgically apertured and secured about a wound site. The top wall includes an access opening having a flanged locking ring of flexible plastic extending thereabout. A removable closure cap is attached to the access opening, the cap having a flat rim of flexible plastic with circumferential locking ribs releasably and sealingly engaging a series of mating ribs provided by the flanged portion of the ring.

Abstract: A catheterization apparatus is provided having a catheter, a drainage hose, and a collection vessel. The catheter is of the endwelling type having a retention balloon for expansion while the head of the catheter is in the bladder or other cavity being drained thereby. The balloon when expanded comprises a plurality of wings or loops which function in cooperation with at least one aperture which communicates the interior bore or lumen of the catheter with the bladder such that the bladder cannot collapse about and occlude the aperture. In this manner, substantially little or no residual urine remains in the bladder during catheterization thereof, thus reducing significantly growth of bacteria within the bladder which would tend to cause a urinary tract infection. The catheter, hose, and vessel normally form a sealed system which is preferably only broken every 24 hours. The vessel is sized so as to accept at least a 24 hour output of urine and is preferably nonreusable.