An extendable guidewire for introducing a dilatation catheter into the cardiovascular system. The guidewire has main and auxiliary sections with a connector which permits the two sections to be joined together and separated simply by pushing the two sections together and pulling them apart. One of the...http://www.google.com/patents/US4875489?utm_source=gb-gplus-sharePatent US4875489 - Extendable guidewire
