Patent ID: 8740844

Claim:
A medical device for delivering a therapeutic agent to an internal portion of a patient's body, the medical device comprising: a shaft; a self-expanding delivery member in operative communication with the shaft, the delivery member having a proximal end and a distal end and being shaped in a continuous solid cylindrical configuration from a porous material capable of (i) releasing the therapeutic agent to the internal portion of the patient's body and (ii) being in a collapsed state; a therapeutic agent delivery lumen defined by a lumen wall, wherein the therapeutic agent delivery lumen is in fluid communication with the delivery member for fluidly connecting the delivery member with a therapeutic agent source; a retention member in operative communication with the delivery member, the retention member being configured and arranged to selectively collapse the delivery member; and a mechanism capable of applying negative pressure through the therapeutic agent delivery lumen to remove fluid from the delivery member, wherein the delivery member expands from a collapsed state to a pre-determined diameter upon retraction of the retention member, and wherein the delivery member expands without absorption of a liquid.