A child weighing 33 kg needs maintenance intravenous fluids. Using the 4-2-1 rule, what hourly rate is required?

Answer and explanation

Correct answer: D. 73 mL/h

  1. Step 1: The 4-2-1 rule gives 4 mL/kg/h for the first 10 kg, 2 mL/kg/h for the next 10 kg and 1 mL/kg/h thereafter.
  2. Step 2: For 33 kg: mL/h.
Answer
73 mL/h.
Why not the others: 132 mL/h: 4 mL/kg/h was applied to the whole weight. 66 mL/h: 2 mL/kg/h was applied to the whole weight. 83 mL/h: The bands of the rule were added wrongly.

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