An IV bag contains 1,000 mL. After 350 mL has infused, the pump continues at 75 mL/hour. How long will the remaining fluid take to infuse?
Correct answer: C. 8 hours 40 minutes
- A. 7 hours 40 minutes
- B. 8 hours 20 minutes
- C. 8 hours 40 minutes
- D. 9 hours 20 minutes
Explanation
The remaining volume is 1,000 − 350 = 650 mL. At 75 mL/hour, 650 ÷ 75 = 8.67 hours, which is 8 hours and 40 minutes. The calculation must use the remaining volume, not the original bag volume.
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About Drug Calculations and Dosage
Drug calculations apply measurement systems, unit conversions, dosage formulas, tablet and liquid doses, percentage and ratio strength, and weight based dosing. Work also includes calculating IV flow rates, infusion times and doses for children, while distinguishing the prescribed dose from the available concentration.
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