US Patent 8140170 Method and apparatus for renal neuromodulation

An apparatus for renal neuromodulation includes an expandable support member having a main body portion for engaging a wall of a blood vessel proximate a renal vasculature and at least one electrode connected with the main body portion. The at least one electrode is arranged to selectively deliver electric current to a desired location where modulation of the sympathetic nervous system is effective to alter renal function. The apparatus further includes an insulative material attached to at least a portion of the main body portion for isolating blood flow through the vessel from the electric current delivered by the at least one electrode.