An endotracheal airway is established using an endotracheal tube having an exterior retention structure defined by a series of longitudinally spaced recesses separated by projections. A variably-sized orifice in a faceplate constricts within a recess and contacts the projections to create a barrier against...http://www.google.es/patents/US20060174893?utm_source=gb-gplus-sharePatente US20060174893 - Complete airway stabilization system and method
