The order from a provider is: 1.5 liters of LR to infuse over 18 hours. The drip factor is 15 gtt/mL. How many gtt/min?
The Correct Answer is ["21"]
Total volume to be infused: 1.5 liters (as given in the order)
1 liter = 1000 mL
Total volume (mL) = 1.5 liters x 1000 mL/liter = 1500 mL
Infusion time: The solution needs to be infused over 18 hours.
Total time (minutes) = Total time (hours) x Minutes/hour
Total time (minutes) = 18 hours x 60 minutes/hour = 1080 minutes
Rate (mL/min): Calculate the volume to be infused divided by the total time in minutes. Rate (mL/min) = Total volume (mL) / Total time (minutes)
Rate (mL/min) = 1500 mL / 1080 minutes = 1.39 mL/min (rounded to two decimal places)
Drip factor: The drip factor is 15 gtt/mL, meaning 15 drops deliver 1 mL of solution. Rate (gtt/min) = Rate (mL/min) x Drip factor (gtt/mL)
Rate (gtt/min) = 1.39 mL/min x 15 gtt/mL = 20.85 gtt/min = 21 gtt/min (rounded to the nearest whole number)
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["12"]
Explanation
To calculate the rate for the infusion pump, you need to determine how many milliliters per hour (mL/hr) will deliver 1200 units of heparin. First, find the concentration of the heparin solution by dividing the total units of heparin by the total volume of the solution. In this case, 25,000 units divided by 250 mL equals 100 units/mL. Next, divide the ordered amount of heparin units per hour by the concentration to find the rate in mL/hr. So, 1200 units per hour divided by 100 units/mL equals 12 mL/hr.
Correct Answer is ["56"]
Explanation
To calculate the flow rate for an IV infusion, you can use the formula: (Volume in mL x Drip factor) / Time in minutes. In this case, the nurse has 500 mL of Ringer's lactate to infuse over 3 hours. First, convert the hours into minutes: 3 hours x 60 minutes/hour = 180 minutes. Next, multiply the volume by the drip factor: 500 mL x 20 gtt/mL = 10,000 gtt. Finally, divide by the total time in minutes: 10,000 gtt / 180 minutes = approximately 55.56 gtt/min. Therefore, the nurse should set the manual IV infusion to deliver around 56 gtt/min.
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