Using the 4-2-1 maintenance fluid rule, what is the hourly maintenance rate for a 12 kg child?

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Study for the Archer Pharmacology Test to master dosage calculations and medication administration. Use flashcards and multiple choice questions with detailed explanations. Get ready for your exam!

Multiple Choice

Using the 4-2-1 maintenance fluid rule, what is the hourly maintenance rate for a 12 kg child?

Explanation:
The 4-2-1 rule gives hourly maintenance fluids based on weight: 4 mL/kg/hr for the first 10 kg, 2 mL/kg/hr for the next 10 kg (11–20 kg), and 1 mL/kg/hr for each kg over 20. For a 12 kg child, calculate 10 kg × 4 = 40 mL/hr, plus 2 kg × 2 = 4 mL/hr, totaling 44 mL/hr. So the hourly maintenance rate is 44 mL per hour. The other options don’t fit because they don’t combine the two weight tiers correctly for a 12 kg patient.

The 4-2-1 rule gives hourly maintenance fluids based on weight: 4 mL/kg/hr for the first 10 kg, 2 mL/kg/hr for the next 10 kg (11–20 kg), and 1 mL/kg/hr for each kg over 20. For a 12 kg child, calculate 10 kg × 4 = 40 mL/hr, plus 2 kg × 2 = 4 mL/hr, totaling 44 mL/hr. So the hourly maintenance rate is 44 mL per hour. The other options don’t fit because they don’t combine the two weight tiers correctly for a 12 kg patient.

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