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Pediatric Maintenance Fluid

4-2-1 RuleHolliday-Segar Fluid Calculation

Input Data

kg

Hydration Baseline

Calculate hourly maintenance fluid requirements for pediatric patients based on current weight.

Guidelines & Evidence

Verified

Last Review: 2026

4-2-1 Rule

Holliday-Segar (4-2-1 Rule)
First 10 kg:4 mL/kg/hour.
Next 10 kg (10–20 kg):2 mL/kg/hour.
Each additional kg (> 20 kg):1 mL/kg/hour.
Example (25 kg child)
Calculation:(10×4) + (10×2) + (5×1) = 40 + 20 + 5 = 65 mL/hr.

Last Comprehensive Review: 2026

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