Mellits and Cheek reported several equations for estimating total body water (TBW) in children based on urine creatinine excretion.
Patient selection: pediatric patients up until puberty
(2) status as normal vs cardiac (congenital heart disease) patient
(3) urine creatinine excretion in mg per day
Total Body Water in liters
(0.021 * (creatinine)) + 7.041
(0.024 * (creatinine)) + 5.735
(0.023 * (creatinine)) + 5.493
(0.026 * (creatinine)) + 4.706
• The estimates would assume normal muscle development and diet.
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