Eluting medical devices

摘要

The invention is directed to a system of delivering a therapeutic agent comprising: a catheter comprising a distensible layer; a coating comprising a therapeutic agent disposed around said distensible layer; an outer sheath over said distensible layer and said coating, wherein said outer sheath has a variably permeable microstructure; and an expandable member, wherein said expandable member is on the distal end a catheter, wherein said expandable member can be placed within said catheter; wherein when said expandable member is expanded, said expandable member will distend said distensible layer and outer sheath allowing transfer of said coating and therapeutic agent to an area external to said outer sheath. 5312915_1 (GHMatters) P96873.AU