Patent ID: 7947015

Claim:
A radially expandable porous delivery device having a shaped form, comprising: a porous body constructed of fluoropolymer material, the fluoropolymer material having a microstructure of nodes interconnected by fibrils, the nodes having an internodal distance of about 10 μm to about 30 μm and oriented to create spaces between the nodes forming channels extending from an inner surface to an outer surface of the porous delivery device through which a fluid can flow; a non-polymeric therapeutic coating disposed on the outer surface of the porous delivery device having a dynamic affinity for the delivery device as well as a targeted tissue location, such that the coating remains on the device during positioning of the delivery device; an inflation fluid conduit disposed in the delivery device configured to supply an inflation fluid sufficient to provide an inflation fluid force to expand the porous body from a reduced diameter collapsed configuration to a pre-defined increased diameter expanded configuration; wherein the microstructure of nodes interconnected by fibrils has a pre-determined porosity configured in part on fluid flow characteristics of the inflation fluid to cause the inflation fluid to weep through the channels at a rate substantially independent of the inflation fluid force; and wherein the therapeutic coating is configured to release from the porous body upon action of the inflation fluid weeping through the porous body.