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Paramedic Readiness Exam 5 Practice Test

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You are ordered to administer a 1000 mL bolus of normal saline over 1 hour. The tubing factor is 10 drops/mL. What is the correct drops per minute?
Correct Answer:
167
Explanation:
To find drops per minute, convert the total volume and tubing factor into a rate per minute. Start by determining how many milliliters flow each minute: 1000 mL divided by 60 minutes equals about 16.67 mL/min. With a tubing factor of 10 drops per milliliter, multiply: 16.67 mL/min × 10 gtt/mL = 166.7 gtt/min. Rounding to the nearest whole drop gives 167 drops per minute. The general formula is gtt/min = (volume in mL × drop factor) / time in minutes. The other options would require different volumes or times to reach 1000 mL in 60 minutes.

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