CCBMA Clinical Practice Exam

Opening the airway is the first priority in basic airway management, and lying the casualty flat on their back allows you to perform the head tilt and chin lift to clear and unblock the airway for ventilation. The supine position stabilizes the head and neck so you can easily access the mouth and nose and deliver rescue breaths if needed.

Putting someone on the stomach would push the tongue and soft tissues toward the back of the throat, worsening obstruction and making ventilation harder. Lying on the side can help in some situations to prevent aspiration once breathing is established, but it isn’t the starting position used to open the airway and prepare for breaths. Sitting up also tends to worsen airway obstruction and complicates airway maneuvers.

So, the unconscious casualty is placed on their back to maximize airway patency and facilitate basic airway procedures.