An intravascular catheter system has a balloon angioplasty device disposed about a common lumen near its distal end. The common lumen is in communication with multiple lumens within a proximal region of the catheter body to allow for positioning of the catheter over a movable guide wire and convenient...http://www.google.com.au/patents/US6712783?utm_source=gb-gplus-sharePatent US6712783 - Catheter system having a balloon angioplasty device disposed over a work element lumen
