What is the 4-2-1 rule for pediatric fluids?

It's a shortcut for the Holliday-Segar method: 4 mL/kg for the first 10 kg, 2 mL/kg for the next 10 kg, and 1 mL/kg for every kg over 20 kg.

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Pediatric Maintenance Fluids Calculator

Calculate daily fluid requirements for pediatric patients based on weight, essential for hydration management.

Proper hydration is vital for hospitalized children who cannot take fluids by mouth. Pediatric fluid requirements are not linear; they are based on the Holliday-Segar method, which estimates caloric expenditure and the resulting water needs. This calculator uses the '4-2-1 rule' to provide both the hourly infusion rate and the total 24-hour fluid volume required.

Apenas para uso educacional. Esta ferramenta não substitui o julgamento clínico ou protocolos locais.

Weight (kg)

Reference

Maintenance rate

50 mL/hr

Maintenance fluids: 50 mL/hr (1200 mL/day)

40 mL + 2 mL/kg/hr * (15 - 10) kg

Weight (kg)15 kg

Daily total1200 mL/day

Method4-2-1 rule

Como funciona

The tool applies a tiered calculation based on the child's weight, ensuring that smaller infants receive proportionally more fluid per kilogram than older children or teenagers.

Fórmula de cálculo

Tiered: 4ml/kg (1st 10kg) + 2ml/kg (2nd 10kg) + 1ml/kg (rest)

Exemplos de cálculo

1. **25kg Child**: (10*4)+(10*2)+(5*1) = **65 mL/hr**.

Por que usar essa ferramenta no seu dia a dia?

Este serviço garante segurança na hidratação dos pacientes mais vulneráveis. Ao automatizar o cálculo escalonado, elimina o risco de desidratação ou sobrecarga de líquidos no atendimento pediátrico, tornando-se uma ferramenta indispensável para enfermeiros e residentes pediátricos.