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
Parameters:
(1) gender
(2) status as normal vs cardiac (congenital heart disease) patient
(3) urine creatinine excretion in mg per day
|
Gender
|
Status
|
Total Body Water in liters
|
|
male
|
normal
|
(0.021 * (creatinine)) + 7.041
|
|
male
|
cardiac disease
|
(0.024 * (creatinine)) + 5.735
|
|
female
|
normal
|
(0.023 * (creatinine)) + 5.493
|
|
female
|
cardiac patient
|
(0.026 * (creatinine)) + 4.706
|
Limitations:
• The estimates would assume normal muscle development and diet.
