·Loss of fluid from the system causes blood pressure to fall to a dangerous level.
·The body responds by diverting blood to the vital organs such as the heart and lungs.
Treatment.
·Treat any cause identified.
·Reassure the casualty.
·Lie them down and raise the legs.
·Loosen tight clothing and keep the casualty warm.
·Monitor ABC and level of response
Do not give the casualty anything to eat or drink and do not let them smoke.
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