Patent ID: 7749203

Claim:
A medical device for long-term implantation comprising: a reservoir comprising (a) a polymer matrix and (b) an antimicrobial agent disposed within said polymer matrix, said reservoir adapted for long-term release of said antimicrobial agent from said polymer matrix; and a surfactant region comprising a surfactant, said surfactant region disposed over said reservoir at an outer surface of said medical device, and a barrier layer is disposed between said polymer matrix and said surfactant region, wherein said medical device is adapted for long-term implantation within the body of a patient, and wherein said medical device is selected from the group consisting of a ureteral stent, a urinary catheter, a urine contacting drug delivery device, a cardiovascular stent, a venous access device, a valve, a vascular graft, a biliary stent and a biosensor.