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CRNE Exam Prep

Category - Changes in Health

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A physician orders 1000 ml of normal saline solution to be infused over 12 hours. The drop factor is 15 drops per 1 ml. A nurse sets the flow rate at how many drops per minute?

21 drops
24 drops
30 drops
31 drops

Explanation

Answer: A - To obtain the number of drops per minute, use the IV flow rate formula:

Total volume x drop factor = drops per minute
Time in minutes

1000 ml x 15 gtts/ml = 15000 gtts = 20.8 = 21 drops per minute
12 hrs x 60 min/hr 720 min

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