What is a primary action to take for a casualty experiencing hyperventilation?

A primary action for a casualty experiencing hyperventilation is to reassure and calm them. Hyperventilation often occurs due to anxiety or panic, leading the person to breathe rapidly, which can disrupt the balance of carbon dioxide and oxygen in their body. By providing reassurance, you help to reduce their anxiety and promote a sense of safety, which can in turn help stabilize their breathing pattern.

Calming the individual is crucial, as panic can exacerbate the hyperventilation, making the situation worse. While other measures, such as controlled breathing techniques, can be helpful, the immediate priority is to address the psychological state of the casualty. By focusing on calming them, you create an environment where they may feel more in control and less anxious about their condition.

This approach can lead to a more effective outcome compared to physical measures that may not directly address the root cause of the hyperventilation, such as speaking with a drink or lying down. The goal is to provide emotional support first, since psychological factors are often the triggering stimuli in such cases.