An artificial airway device (10) of a resilient material for use as a combined obturator and airway device without penetration into a larynx comprising a pre-formed flexible saccular chamber (14) and having a semi-rigid hollow stem (14) projecting from a position at or near one end of the chamber at...http://www.google.fr/patents/US7263998?utm_source=gb-gplus-shareBrevet US7263998 - Respiratory apparatus
