When should you not give fluids to a casualty?

Giving fluids to a casualty is a critical decision that can greatly impact their recovery and stabilization. When a casualty shows signs of shock, it often indicates that their body is struggling to maintain circulation and may be unable to effectively process fluids due to insufficient blood volume or compromised cardiovascular function. In such situations, administering fluids could exacerbate the problem and lead to complications such as aspiration if the person is unable to swallow safely or if their gag reflex is diminished.

Shock can stem from various causes, including significant blood loss, severe dehydration, or trauma, and often requires immediate medical intervention rather than standard fluid replacement. Therefore, it is crucial to assess the casualty's condition and prioritize other immediate medical needs instead of giving fluids at the risk of worsening their state.