When mucus, vomitus, or blood is present in a casualty's airway, what treatment should you perform?

When mucus, vomitus, or blood is present in a casualty's airway, suctioning is the appropriate treatment because it directly addresses the issue of obstruction. Airway obstruction can lead to compromised oxygenation and ventilation, which is critical in emergency situations. Suctioning helps clear the airway, allowing the casualty to breathe more easily and effectively.

This is essential because any material that blocks the airway can result in respiratory distress or failure. By removing these obstructions, the rescuer can help restore a clear pathway for airflow, which is vital for survival.

Other interventions, while important in various contexts, do not provide the immediate solution needed in this scenario. For instance, intubation is a more advanced procedure that involves placing a tube in the airway but requires a clear passage to be successful. Similarly, using an airway adjunct may provide assistance in maintaining an open airway, but it wouldn’t remove the obstructive material. Providing supplemental oxygen, while important for a patient with compromised oxygenation, does not address the blockage directly and would be ineffective without first clearing the airway.