If a health professional must calculate the infusion rate of 500 mL in 4 hours, what is the rate in mL/hour?

To determine the infusion rate in mL/hour for a volume of 500 mL to be administered over a duration of 4 hours, you need to use the formula for calculating the flow rate:

Infusion Rate (mL/hour) = Total Volume (mL) ÷ Total Time (hours)

In this case, the total volume is 500 mL and the total time is 4 hours. Plugging the values into the formula gives:

Infusion Rate = 500 mL ÷ 4 hours = 125 mL/hour.

This means the correct infusion rate is 125 mL/hour, which directly corresponds to the answer provided. Understanding how to apply the formula is crucial for calculating infusion rates accurately, ensuring proper medication administration and patient safety.