An apparatus and method for selectively delivering a medicament to a target location of the wall of a body cavity, blood vessel, or the like, comprising a compressed hollow cylinder of permeable, expandable foam, attached to the distal end of a delivery device such as a catheter or catheter guidewire....http://www.google.de/patents/US6398758?utm_source=gb-gplus-sharePatent US6398758 - Medicament delivery system
