4 2 1 rule

How is the 4 2 1 Rule Applied?

The rule is applied based on the patient's body weight. The calculation is broken down as follows:
For the first 10 kg of body weight, administer 4 mL of fluid per kg per hour.
For the next 10 kg of body weight, administer 2 mL of fluid per kg per hour.
For any weight above 20 kg, administer 1 mL of fluid per kg per hour.
For example, for a patient weighing 25 kg:
First 10 kg: 4 mL/kg/hr = 40 mL/hr
Next 10 kg: 2 mL/kg/hr = 20 mL/hr
Remaining 5 kg: 1 mL/kg/hr = 5 mL/hr
The total fluid requirement would be 40 + 20 + 5 = 65 mL/hr.

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