A blood vessel dilatation apparatus includes an inner tube having a lumen; an outer tube forming a lumen between the outer tube and an outer surface of the inner tube; a dilatation member; a first opening provided at a rear end portion of the inner tube and communicating with the lumen; a second opening...http://www.google.es/patents/US6447479?utm_source=gb-gplus-sharePatente US6447479 - Blood vessel dilatation apparatus
