If you need to infuse 300 mL of fluid over 4 hours, what should be the infusion rate in mL/hr?

To determine the infusion rate in mL/hr when infusing 300 mL of fluid over 4 hours, you divide the total volume of fluid by the total time in hours.

First, calculate the rate:

Infusion Rate (mL/hr) = Total Volume (mL) / Total Time (hr)

Substituting in the values:

Infusion Rate = 300 mL / 4 hr = 75 mL/hr

Thus, the correct infusion rate is 75 mL/hr, which corresponds to the answer you identified. This calculation is essential for ensuring that intravenous fluids are administered at the correct rate, which is critical for patient safety and treatment efficacy.