What is the recommended position for treating shock in a casualty?

Lying on their back is the recommended position for treating shock in a casualty because this position helps to maintain blood flow to vital organs, particularly the brain and heart. By keeping the casualty supine (on their back), you ensure that gravity assists with venous return, which is crucial in a shock situation where blood circulation may be compromised. This position can also help in managing any respiratory distress, as it allows for optimal lung expansion.

Additionally, positioning in this manner facilitates monitoring of the casualty's condition and allows for easy administration of any necessary interventions, such as administering oxygen or starting intravenous fluid therapy. It is also important to keep the casualty warm and calm, further enhancing the chances of recovery from shock.