According to an aspect of the invention, implantable or insertable medical devices are provided which contain the following: (a) one or more porous regions comprising pores and (b) one or more therapeutic agents which are (i) contained within the porous region, (ii) disposed beneath the porous region,...http://www.google.co.uk/patents/US7666179?utm_source=gb-gplus-sharePatent US7666179 - Medical devices having porous regions for controlled therapeutic agent exposure or delivery
