A method and apparatus for a medical airway passage device suitable for maintaining an airway for a patient is provided. The medical airway passage device includes a novel coupler device designed to prevent contamination, infection, and unwanted discharge of patient fluids and solids during usage. The coupler includes a locking mechanism configured to lock the coupler to a breathing tube and thus preventing unintentional decoupling of the coupler from the breathing tube. The coupler also includes a self-sealing suction port for removing patient discharges. The coupler further includes a filter for enabling the free flowing passage of airflow but prevention of the flow of patient discharges.
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