A steerable elongated medical device adapted to be advanced through a tortuous pathway to a desired location in a body includes an outer tube extending between an outer tube proximal segment and an outer tube distal segment, having an outer tube wall forming an outer tube lumen and an elongated outer...http://www.google.com/patents/US7101361?utm_source=gb-gplus-sharePatent US7101361 - Steerable medical device having means for imparting curves in the device and in elongated implantable medical instruments
