A catheter device having a plurality of axially extending, circumferentially spaced electrodes carried thereby, infusion means for infusion of fluid medium for carrying genes and drugs, and expandable sealing means at each end of the electrodes for sealing off and confining the therapeutic medium to...http://www.google.co.uk/patents/US5507724?utm_source=gb-gplus-sharePatent US5507724 - Electroporation and iontophoresis apparatus and method for insertion of drugs and genes into cells
