What is the flow rate in gtt/min if an IV is set to infuse at 40 mL/hr with tubing that delivers 15 gtt/mL?

To determine the flow rate in gtt/min, you need to convert the infusion rate from mL/hr to gtt/min using the drop factor provided. Here’s how to properly calculate it.

First, start by converting the infusion rate from mL/hr to mL/min. Since there are 60 minutes in an hour, divide the rate by 60:

40 mL/hr ÷ 60 min/hr = 0.6667 mL/min.

Next, you multiply the result by the drop factor, which in this case is 15 gtt/mL, to find the flow rate in drops per minute:

0.6667 mL/min × 15 gtt/mL = 10 gtt/min.

Therefore, the correct flow rate is 10 gtt/min, which matches the answer choice provided. This calculation is important because accurately determining the flow rate ensures that patients receive the correct volume of medication in a timely manner, which is essential for treatment efficacy and patient safety.