For an unconscious casualty without an airway obstruction, what is the first step to take?

For an unconscious casualty who does not have an airway obstruction, placing them in the recovery position is essential to ensure their airway remains open and unobstructed. This position helps facilitate drainage of any potential fluids from the mouth, reduces the risk of aspiration, and keeps the airway clear while awaiting further medical assistance.

By positioning the unconscious casualty on their side, the tongue is less likely to block the throat, thereby significantly improving the chance that they will maintain an open airway and be able to breathe adequately until professional help arrives. This first action is critical in any unconscious patient scenario to stabilize their condition and ensure safety.

Other actions, while important in various situations, are not the immediate priority in this scenario. Administering CPR is necessary only if there is no pulse or breathing; checking for a pulse is relevant but should ideally be done after ensuring the airway is open; and calling for emergency help is imperative but comes after addressing the immediate needs of the casualty.