How fast should hypernatremia be corrected?

Chronic hypernatremia: lower Na ≤10-12 mEq/L per 24h (0.5 mEq/L/h) to prevent cerebral edema from rapid fluid shifts.

What fluid replaces free water deficit?

D5W (free water), 1/4 NS (mostly free water), or oral water. D5W preferred for pure water deficit; 1/2 NS if some sodium deficit coexists.

What causes hypernatremia?

Diabetes insipidus (central or nephrogenic), excessive sweating, diarrhea, inadequate water intake in elderly/debilitated, hypertonic fluid administration.

Free Water Deficit Calculator

Calculate free water deficit in hypernatremia (FWD = 0.6 × weight × (actual Na/140 - 1)) — guides fluid replacement rate.

Use the full interactive calculator below, or

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Frequently Asked Questions

How fast should hypernatremia be corrected?

What fluid replaces free water deficit?

What causes hypernatremia?