A patient needs to infuse 500 mL over 2 hours. What is the rate in mL/hr?

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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

A patient needs to infuse 500 mL over 2 hours. What is the rate in mL/hr?

Explanation:
Infusion rate is the amount of fluid delivered per hour. To find it, divide the total volume by the total time in hours. For 500 mL over 2 hours, 500 ÷ 2 = 250, so the rate is 250 mL per hour. This means the pump should be set to deliver 250 mL each hour. As a quick check, 250 mL/hr × 2 hours = 500 mL, which matches the prescribed volume. If you try other rates, they wouldn’t deliver the correct total in 2 hours (for example, 150 mL/hr would give 750 mL in 2 hours, 200 mL/hr would give 400 mL, etc.).

Infusion rate is the amount of fluid delivered per hour. To find it, divide the total volume by the total time in hours. For 500 mL over 2 hours, 500 ÷ 2 = 250, so the rate is 250 mL per hour. This means the pump should be set to deliver 250 mL each hour. As a quick check, 250 mL/hr × 2 hours = 500 mL, which matches the prescribed volume. If you try other rates, they wouldn’t deliver the correct total in 2 hours (for example, 150 mL/hr would give 750 mL in 2 hours, 200 mL/hr would give 400 mL, etc.).

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