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A nurse is preparing to administer Ringer lactate 500 mL intravenous (IV) bolus to infuse over 3 hours. The drop factor of the manual IV tubing is 2 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Answer and Explanation

The Correct Answer is ["56"]

To calculate the infusion rate, we'll use the following formula:

Infusion rate (gtt/min) = (Volume to be infused (mL) / Time (min))  Drop factor (gtt/mL)

First, calculate the total time in minutes:

  • 3 hours  60 minutes/hour = 180 minutes

Then, calculate the volume per minute:

  • 500 mL / 180 minutes = 2.78 mL/min

Finally, multiply the volume per minute by the drop factor:

  • 2.78 mL/min  20 gtt/mL = 55.6 gtt/min

Therefore, the nurse should set the manual IV infusion to deliver 56 gtt/min.


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