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