What should you do if a casualty vomits during artificial respiration?

When a casualty vomits during artificial respiration, it is crucial to maintain their airway and prevent aspiration, which could lead to choking or further complications. Turning the head to one side allows any vomit to drain out of the mouth rather than being inhaled into the lungs, which is essential for ensuring the safety of the individual.

After clearing the mouth of any obstructions, you can then reassess the situation before potentially resuming artificial respiration if the airway is clear. This method provides a direct and effective way to manage the emergency while prioritizing the casualty’s immediate needs and safety.

Continuing breaths without interruption can increase the risk of aspiration, while stopping the procedure without taking any action could lead to the casualty's worsening condition. Calling for medical help is important but should not be the immediate focus during the act of responding to a vomit incident; controlling the airway is paramount. Thus, the action of turning the head to the side and clearing the mouth is the most appropriate response in this scenario.