A balloon catheter for use in angioplasty includes an elongated flexible thin walled metal tube which carries an inflatable balloon at its distal end. A core member of smaller outer diameter than the metal tube is attached to the distal end of the tube to provide support for and guiding of the balloon...http://www.google.fr/patents/US4943278?utm_source=gb-gplus-shareBrevet US4943278 - Dilatation balloon catheter
