A nasal cannula adapter. The nasal cannula adapter includes a chamber having cannula clips, and a connector having an opening and a connector lumen in communication with the chamber and the opening. Systems for administering a gas to a patient comprise the nasal cannula adapter, a nasal cannula, and an airway device. Methods for administering a gas to a patient comprise administering a gas through a nasal cannula operably connected to the nasal cannula adapter operably connected to an airway device inserted into the airway of the patient.
