Glottis Mask Airway (GMA)—an aperture of larynx sealed airway for human ventilation includes a main airway a non-inflatable cuff at the distal end of the main airway the shape of the cuff is matched the shape of aperture of larynx perfectly. There is a sealing ring in the device to seal the intersection angle between the aperture of larynx and the wall of pharynx to prevent leakage during the ventilation. There is an epiglottis holder within the cuff where corresponding the epiglottis to prevent the epiglottis falls into the main airway cause the airway block. Plus there are 1) C-channel for gastric tube insertion 2) at the proximal end of the main airway an openside airway is able to push ETT to the proper position at once 3) a tongue base rest as the device stabilizer to stabilize the device in using.
