Apparatus for introduction into the vessel of a patient comprising a guiding catheter adapted to be inserted into the vessel of the patient and a device adapted to be inserted into the guiding catheter. The device includes a flexible elongate member and a sleeve carried by the flexible elongate...http://www.google.com/patents/US5685312?utm_source=gb-gplus-sharePatent US5685312 - Angioplasty apparatus facilitating rapid exchanges and method
