What method is used to assess circulation in an unconscious casualty?

To assess circulation in an unconscious casualty, checking the pulse at the carotid artery is the most appropriate method. This is because the carotid artery is located in the neck and is one of the major arteries that supply blood to the brain. In an unconscious individual, it is vital to check a central pulse to ensure that adequate blood flow and circulation to vital organs are maintained.

The carotid pulse is typically stronger and more readily palpable than peripheral pulses, like those at the wrist, making it a reliable choice in emergency situations. Additionally, it is less likely to be influenced by peripheral factors that might affect blood flow, such as cold temperatures or extremity injuries. Therefore, assessing the carotid pulse helps in making a quick determination of the casualty’s circulatory status, which is critical for timely medical intervention.