A catheter and drainage system 1 wherein said oligodynamically active metal is one selected from the group consisting of silver, gold, {HEAD ~ copper} and {TAIL ~ their alloys} 
A catheter and drainage system 1 wherein said oligodynamically active metal is one selected from the group consisting of silver , gold , { HEAD ~ copper } and { TAIL ~ their alloys }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL