Total Body Water (TBW) Deficit Formula - Respiratory Calculators

Formula:


Body Water Deficit (in liters) = ( 0.6 * Wt * [(Na/140) - 1] )

Where,
Wt = current weight in kg
Na = measured serum Na in mmol/L
(Assumes Total Body Water is 60% of current body weight; may be less in female or cachectic patients)

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