Nephrology
Free Water Deficit
Estimated water deficit in hypernatraemia.
Education and reference only. Not a substitute for clinical judgement, local policy or product labelling. Always verify before clinical use. Values are calculated in your browser and never stored.
Critical actions
Correct hypernatraemia slowly (aim to lower sodium by ≤10–12 mmol/L per 24h) to avoid cerebral oedema. This is an estimate; reassess and recalculate frequently.
Evidence & references
- Adrogué HJ, Madias NE. Hypernatremia. NEJM. 2000.
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