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Symptoms and Signs – Differential Diagnosis of Hypernatraemia
Dehydration:
Reduced Fluid intake: elderly, confused or unconscious
Increased Fluid loss GI: diarrhoea vomiting
Renal: diabetes insipidus, osmotic diuresis (e.g. hyperglycaemia,
hypercalcaemia)
Skin: excessive sweating
Hyperosmolar non-ketotic coma
Excess Na+ administration (e.g. sodium bicarbonate)
Excess mineralocortcoids: hyperaldosteronism
Dehydration:
Reduced Fluid intake: elderly, confused or unconscious
Increased Fluid loss GI: diarrhoea vomiting
Renal: diabetes insipidus, osmotic diuresis (e.g. hyperglycaemia,
hypercalcaemia)
Skin: excessive sweating
Hyperosmolar non-ketotic coma
Excess Na+ administration (e.g. sodium bicarbonate)
Excess mineralocortcoids: hyperaldosteronism
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