The invention features a method for triggering release of a drug from a hydrogel polymer to tissue at a desired location of the body using a catheter. A portion of the catheter is coated on its outer surface with a polymer having the capacity to incorporate a predetermined substantial amount of drug...http://www.google.fr/patents/US7066904?utm_source=gb-gplus-shareBrevet US7066904 - Triggered release hydrogel drug delivery system
