A maintenance IV infusion is 1000 mL over 8 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 maintenance IV infusion is 1000 mL over 8 hours. What is the rate in mL/hr?

Explanation:
Calculating an IV infusion rate means turning a total volume into a per-time rate by dividing the volume by the time over which it is delivered. For a maintenance infusion of 1000 mL over 8 hours, divide 1000 by 8. 1000 ÷ 8 equals 125. So the rate is 125 mL per hour. If this rate runs for the full 8 hours, the total delivered will be 8 × 125 = 1000 mL, confirming the calculation. This is the rate you set on a pump or calculate manually to ensure the patient receives the intended total volume evenly over the prescribed time. If you needed the rate in a different unit, such as mL per minute, you would divide by 60, giving about 2.08 mL/min.

Calculating an IV infusion rate means turning a total volume into a per-time rate by dividing the volume by the time over which it is delivered. For a maintenance infusion of 1000 mL over 8 hours, divide 1000 by 8. 1000 ÷ 8 equals 125. So the rate is 125 mL per hour. If this rate runs for the full 8 hours, the total delivered will be 8 × 125 = 1000 mL, confirming the calculation. This is the rate you set on a pump or calculate manually to ensure the patient receives the intended total volume evenly over the prescribed time. If you needed the rate in a different unit, such as mL per minute, you would divide by 60, giving about 2.08 mL/min.

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