Provides adequate oxygenation and ventilation during the process of tracheal intubation. 

Increases the success rate of tracheal intubation in difficult airway.

Combine with other accessory devices to provide supraglottic oxygenation and jet ventilation during the process of direct laryngoscopy for tracheal intubation.

Facilitate end tidal carbon dioxide pressure(PetCO2) monitoring (Connect to a CO2 monitoring catheter).