An IV prescription calls for 400 ml to be given over 4 hours. What should the hourly infusion rate be?

Question

TheoryPractice · Accepted Answer

100 ml/hr. 400 ml divided by 4 hours equals 100 ml/hr.

Why the other options are incorrect:
• 80 ml/hr: At 80 ml/hr, only 320 ml would be infused over 4 hours, well below the prescribed volume.
• 90 ml/hr: A rate of 90 ml/hr would deliver 360 ml in 4 hours, short of the required 400 ml.
• 110 ml/hr: At 110 ml/hr, the total delivered would be 440 ml, slightly over the ordered amount.
• 120 ml/hr: A rate of 120 ml/hr would infuse 480 ml over 4 hours, significantly exceeding the prescription.

An IV prescription calls for 400 ml to be given over 4 hours. What should the hourly infusion rate be?

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