Under Holliday-Segar, how many mL/kg/day are allotted for the next 10 kg (from 10 to 20 kg)?

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

Answer: (B)

In Holliday-Segar, maintenance fluid needs are assigned in weight-based tiers that decrease as weight increases. For the range from 10 to 20 kilograms, the maintenance rate is 50 mL per kilogram per day. So for the next 10 kg, the allotted amount per day is 10 kg × 50 mL/kg/day = 500 mL/day, and the per-kilogram daily rate remains 50 mL/kg/day. The other numbers come from different weight ranges: 100 mL/kg/day applies to the first 10 kg, and 20 mL/kg/day applies to weight above 20 kg.