The invention relates to a directional drug delivery stent which includes an elongated or tubular member having a cavity containing a biologically active agent. In one embodiment, the active agent is diffused from the reservoir directly to the walls of a body lumen, such as a blood vessel, through directional...http://www.google.es/patents/US6071305?utm_source=gb-gplus-sharePatente US6071305 - Directional drug delivery stent and method of use
