When treating a casualty with a head injury, what should be closely monitored?

Monitoring the level of consciousness and changes in behavior is crucial when treating a casualty with a head injury because these indicators can provide vital information about the severity of the injury and the potential for complications, such as brain swelling or bleeding. Changes in consciousness, ranging from confusion to unresponsiveness, can signify deteriorating neurological status, making it essential to assess for any shifts in cognitive function, alertness, or behavior.

In cases of head injuries, the brain may be directly affected, leading to alterations in neurological function. Regular checks of the casualty's responsiveness can help indicate whether their condition is stable or if it is worsening, prompting immediate medical intervention if needed. This monitoring can include asking questions, observing eye movements, and evaluating how the casualty is responding to stimuli. Early recognition of any decline in consciousness can be life-saving.

The other factors such as breathing patterns, movement of limbs, and skin temperature are also important in a broader first aid context but are not as directly indicative of head injury complications as consciousness and behavior changes, which can reflect critical neurological responses.