A laryngeal mask of the type used to facilitate lung ventilation and the insertion of endo-tracheal tubes or related medical instruments through a patient's laryngeal opening as used during general anesthesia, intensive care, or critical patient care. The mask includes an inflatable positioning shield...http://www.google.fr/patents/US5937860?utm_source=gb-gplus-shareBrevet US5937860 - Laryngeal mask
