A oxygen administering system for coupling an oxygen source and a CO2 monitor to a laryngeal mask airway includes a laryngeal mask airway that is inserted into a patient undergoing general anesthesia. An oxygen tube is fluidly coupled to an oxygen source to deliver gaseous oxygen and a CO2 monitor is provided to detect and monitor a flow of carbon dioxide. A coupler is selectively and fluidly coupled to the laryngeal mask airway. The coupler is selectively and fluidly coupled to the oxygen source to direct the gaseous oxygen into the laryngeal mask airway. Moreover, the coupler is in fluid communication with the CO2 monitor to monitor a flow of carbon dioxide that is exhaled through the laryngeal mask airway.