A device used to introduce a cardioplegic solution into a coronary artery has an elongated tube and a pliable annular member mounted on the outlet end of the tube. The annular member is a cup-shaped pliable plastic member having an open end that is larger than the inlet arterial opening to the coronary...http://www.google.de/patents/US4610661?utm_source=gb-gplus-sharePatent US4610661 - Perfusion device
