An extendable, guide wire providing an apparatus for effecting exchange of over-the-wire catheters without requiring either a double length guide wire or the addition of an extension guide wire. The guide wire includes a distal member for insertion into the patient and a proximal member for extension...http://www.google.es/patents/US6080117?utm_source=gb-gplus-sharePatente US6080117 - Guide wire extension system
