Under Holliday-Segar, how many mL/kg/day are allotted for the first 10 kg?

• A. 100 mL/kg/day
• B. 50 mL/kg/day
• C. 20 mL/kg/day
• D. 15 mL/kg/day

Answer: (A)

Under the Holliday-Segar method, maintenance fluid needs are estimated with a tiered mL/kg/day approach. The amount for the first ten kilograms is 100 mL per kilogram per day. Therefore, for the initial 10 kg the daily maintenance volume is 100 mL/kg/day. This reflects baseline hydration and electrolyte maintenance needs derived from pediatric energy expenditure data. After 10 kg, the rates change to 50 mL/kg/day for the next 10 kg, and 20 mL/kg/day for each kilogram beyond 20 kg.