You have just pulled up on standby next to your favourite fast food joint when the MDT flashes up: it is a red call to a 49-year-old gentleman with cramps, chest pain and drowsiness. As you begin your assessment this does not appear very serious, the patient denies any chest pain and perhaps they should follow this up with his own GP but you feel there is more to this than meets the eye…..

Hyponatraemia is a complex and potentially life-threatening condition that requires very careful management. This issue explores the causes, signs and symptoms, assessment and management of this condition, showing how best to respond to a patient with potential hyponatraemia in the pre-hospital setting.

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