A catheter for delivering a therapeutic or diagnostic agent to a branch blood vessel of a major blood vessel, generally comprising an elongated shaft having at least one lumen in fluid communication with an agent delivery port in a distal section of the shaft, an expandable tubular member on the distal...http://www.google.se/patents/US7122019?utm_source=gb-gplus-sharePatent US7122019 - Intra-aortic renal drug delivery catheter
