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A nurse is infusing an IV fluid at 40 mL/hr, and 376 mL of fluid remains in the bag. The current time is 19:30. What is the infusion time in hr and min?

A.

9 hr and 15 min

B.

9 hr and 24 min

C.

9 hr and 30 min

D.

9 hr and 40 min

Answer and Explanation

The Correct Answer is B

We can use the following formula to calculate the infusion time:

Infusion time (in hours) = Remaining volume (in mL) / Infusion rate (in mL/hr)

First, let's convert the current time to minutes since we will be calculating the infusion time in minutes as well:

19:30 = 19 hours x 60 minutes/hour + 30 minutes = 1170 minutes Now we can substitute the given values into the formula:

Infusion time (in hours) = 376 mL / 40 mL/hr Infusion time (in hours) = 9.4 hours

To convert this to hours and minutes, we can separate the integer and decimal parts of the answer:

9 hours (integer part) and 0.4 hours x 60 minutes/hour = 24 minutes (decimal part)

Therefore, the infusion time is 9 hours and 24 minutes, and the infusion will finish at approximately 04:54 (19:30 + 9 hours and 24 minutes).


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Related Questions

Correct Answer is D

Explanation

Choice A:One tablet contains 500 mg, which is far below the prescribed dose of 15 g/day. Administering one tablet daily would only provide 500 mg/day, which is insufficient.

Choice B:Each dose of 2 tablets provides 1000 mg (1 g), and giving this dose three times daily totals 3000 mg (3 g/day). This is significantly less than the required 15 g/day.

Choice C:Half a tablet would provide 250 mg/day, which is far below the prescribed dose of 15 g/day. This is inadequate and does not meet the prescription requirements.

Choice D:

The provider ordered 15 g/day of niacinamide. 15g=15,000mg

Tablet strength: Each tablet contains 500 mg. 15,000mg÷500mg=30tablets/day

Dosing schedule: The order is for a daily dose, divided evenly across the day. If given every 8 hours (3 doses/day): 30tablets÷3doses=10 tablets/dose

Correct Answer is D

Explanation

A. 0.04 mg

  • This is far too small.

  • It might come from a miscalculation involving the concentration (1 mg/mL) and volume (5 mL), but incorrectly dividing again by 100.

  • Not clinically reasonable because the patient would barely receive any drug.

B. 0.25 mg

  • This is also incorrect.

  • It could result from mistakenly dividing 5 mg by 20 minutes instead of 2 minutes.

  • Again, far below the actual ordered rate.

C. 3.75 mg

  • This is incorrect but closer.

  • It might come from a misstep like subtracting 1.25 mg from the correct answer (2.5 mg) or misusing the concentration.

  • Still not the right calculation.

D. 2.5 mg

  • Correct answer.

  • Direct calculation: 5 mg ÷ 2 minutes = 2.5 mg/min.

  • Matches the ordered dose and administration time.

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