What immediate action should be taken if a casualty has a sucking chest wound?

In the management of a sucking chest wound, the immediate action involves sealing the wound to prevent air from entering the pleural space, which can lead to a life-threatening condition known as a tension pneumothorax. This is critical because when air enters the chest cavity during inhalation and cannot escape, it can cause increased pressure that may compromise breathing and circulation.

Sealing the wound can typically be achieved using a non-porous material, like plastic wrap or a commercial occlusive dressing, which should be taped on three sides to allow for air escape during exhalation while preventing further air from entering the chest during inhalation. This helps stabilize the patient until they can receive further medical attention.

While applying a pressure dressing, performing CPR, or calling for urgent medical help are all important components of first aid and emergency response, they should follow the immediate need to address a sucking chest wound by sealing it to stabilize the casualty’s condition.