What is the maintenance intravenous fluid rate (4-2-1 rule) for a child weighing 22 kg?
Answer and explanation
Correct answer: A. 62 mL/h
- Step 1: The 4-2-1 rule: 4 mL/kg/h for the first 10 kg, 2 mL/kg/h for the next 10 kg, 1 mL/kg/h for each kg above 20.
- Step 2: Total for 22 kg = 62 mL/h.
Answer
62 mL/h.
Why not the others: The rule is applied in bands; using 4 mL/kg/h for the whole weight overestimates the rate.
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