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Free water deficit based on current sodium level

Current sodium level: mEq/L
Reference Na+ level: mEq/L
Dosing factor x weight (kg) x ((serum Na/140)-1)
(Dosing factor = 0.6 if male and 0.5 if female)
Reference: Adrogue HJ, Madias NE. Hypernatremia. N Engl J Med 2000 May 18;342(20):1493-9


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