Apparatus and method is disclosed for facilitating balloon catheter exchange in angioplasty procedures. A guide catheter allows the balloon catheter to be inserted into the subject to a region near a treatment region within the vascular system. A fluid source is provided for selectively...http://www.google.com/patents/US5713854?utm_source=gb-gplus-sharePatent US5713854 - Method and apparatus for dilatation catheterization
