Abstract: A retention catheter, particularly adapted for draining a bodily viscus or cavity, has a bilobated balloon disposed to enclose the distal tip and a pair of opposed drainage eyes retracted from the distal end, the eyes opening through the exteriorly mounted balloon into the drainage lumen. When suitably inflated, the catheter assumes the correct position to enable continuously complete drainage of the cavity from its lowermost portion. A reinforced tip permits use of a wire guide for catheter insertion when this is needed in difficult situations.