IV Infusion Time Practice Problems

This quiz on IV infusion times will test your ability to solve dosage and calculation problems that require you to determine the time an IV infusion will be complete.

These IV infusion time problems were designed to help you better understand how to apply basic conversions to advanced drug problems. In nursing school, you will be required to learn how to solve these types of problems, along with other drug and dosage calculations.

After you take this quiz, be sure to check out our other dosage and calculation quizzes with video teaching tutorials that go along with each quiz.

IV Infusion Time Tutorial

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IV Infusion Time Practice Problems

1.       The doctor orders 1000 mL bag of IV Normal Saline to infuse at a rate of 50 mL/hr. How long will it take for the IV bag to completely infuse?

2.       The doctor orders a 500 mL bag of IV Normal Saline to infused at 20 gtt/min. The drip factor is 10 gtt/mL. You start the IV infusion at 0500. At what time will the infusion be complete?

3.       The doctor orders 1 L of 0.45% Normal Saline to infuse at 200 mL/hr. You start the infusion at 0800. When will the infusion be complete?

4.       The doctor orders a Heparin infusion to be started at 18 units/kg/hour. The patient weighs 130 lbs. You’re supplied with a 500 mL bag of Heparin that reads 25,000 units/500mL. You start the infusion at 0200 on 11/11. At what time will the infusion be complete?

5.       The doctor orders a Dobutamine infusion to be started at 10 mcg/kg/min. The patient weighs 180 lbs. You’re supplied with a 250 mL bag of Dobutamine that reads 2 mg/mL. How long will it take for the Dobutamine infusion to complete?

6.       The doctor orders  2 L of 0.45% Normal Saline to infuse at 150 mL/hr. How long will it take for the infusion to complete?

7.       The doctor orders 1 L of LR to infuse at 75 gtt/min. The drip factor is 15 gtt/mL. How long will it take for the infusion to complete?

Answer Key:

1. 20 hours
2. 0910
3. 1300
4. 0128 on 11/12
5. 10 hrs 12 minutes (NOTE: The correct answer is 10 hours and 12 minutes, based on rounding at the final step. If you rounded earlier, you may have calculated 10 hours and 25 minutes. Rounding rules can vary, so follow the method your program or instructor prefers.)
6. 13 hrs 20 minutes
7. 3 hrs 20 minutes
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