What is the maximum total fluid over 24 hours for a neonate?

• A. 60 ml/kg
• B. 80 ml/kg
• C. 100 ml/kg
• D. 40 ml/kg

Answer: (B)

In neonates, fluid needs are relatively modest because their kidneys aren’t fully mature and they have high insensible losses relative to body size. The practical guideline used for maximum total fluid in a 24-hour period is about 80 ml per kilogram. This cap helps ensure adequate hydration and perfusion while reducing the risk of fluid overload and electrolyte imbalances in the first days of life.

So, for example, a 3 kg neonate would have a maximum around 240 ml of fluid in 24 hours (3 kg × 80 ml/kg). Clinical adjustments may be made for conditions like fever, sepsis, or kidney issues, but 80 ml/kg/day is the commonly cited upper limit.