A rectal drain catheter 10 is provided with an inflatable retaining cuff 20 at a distal end 16 of the main tubular drainage element 12 and inflation lumen 22, 24 for the cuff that is not collapsible and a flushing lumen 50 that is collapsible with the main drain lumen 12 of the catheter, but has a larger cross section than the inflating lumen when not collapsed.