For an order of 1000 mL D5W at 125 mL per hour, how long will the IV last?

To determine how long the IV of 1000 mL of D5W (5% dextrose in water) will last when being infused at a rate of 125 mL per hour, you need to perform a simple calculation.

First, you divide the total volume of fluid by the infusion rate. This gives you the total time in hours that the IV will last.

So, the calculation is as follows:

1000 mL / 125 mL per hour = 8 hours.

This indicates that at a continuous infusion rate of 125 mL per hour, the entire bag of fluids will be depleted after 8 hours. Therefore, the IV will last for 8 hours, which corresponds to the correct answer.

This calculation is vital in clinical practice as it allows healthcare providers to anticipate the duration of fluid therapy and manage patient care effectively.