A nurse, via an infusion pump, sets up an infusion rate ratio of 2.75 mL/min for a continuous intravenous (IV) fluid for 7 hours.
What is the total volume of IV fluid being infused, in liters?
1.55 L
1.15 L
1.25 L
1.16 L
The Correct Answer is D
To answer this question, we need to calculate the infusion rate in mL per hour, then multiply it by the total time in hours, and finally divide it by 1000 to get the volume in litres.
The infusion rate in mL per hour is the amount of fluid that is given to a patient over a period of time. It can be calculated by dividing the total volume of fluid in mL by the total time in hours². In this case, the infusion rate is:
2.75 mL/min × 60 min/h = 165 mL/h
The total volume of fluid in mL is the infusion rate multiplied by the total time in hours. In this case, the total volume is:
165 mL/h × 7 h = 1155 mL
The volume in litres is the volume in mL divided by 1000. In this case, the volume in litres is:
1155 mL / 1000 = 1.16 L
Therefore, the correct answer is d. 1.16 L.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
To find the volume of fluid that will be left at 10:00 am, you need to calculate the following:
- The time elapsed in minutes from 8:45 am to 10:00 am using the formula: Time elapsed (min) = End time (min) - Start time (min)
- The volume of fluid infused in milliliters (mL) during the time elapsed using the formula: Volume infused (mL) = Flow rate (mL/min) x Time elapsed (min)
- The volume of fluid left in milliliters (mL) at 10:00 am using the formula: Volume left (mL) = Initial volume (mL) - Volume infused (mL)
First, use the formula for time elapsed to find how many minutes have passed from 8:45 am to 10:00 am:
Time elapsed (min) = End time (min) - Start time (min)
Since the end time is 10:00 am and the start time is 8:45 am, plug in these values into the formula:
Time elapsed (min) = 600 min - 525 min
Simplify and solve for the time elapsed:
Time elapsed (min) = 75 min
Next, use the formula for volume infused to find the amount of fluid infused in milliliters during the time elapsed:
Volume infused (mL) = Flow rate (mL/min) x Time elapsed (min)
Since the flow rate is 2 mL/min and the time elapsed is 75 min, plug in these values into the formula:
Volume infused (mL) = 2 mL/min x 75 min
Simplify and solve for the volume infused:
Volume infused (mL) = 150 mL
Then, use the formula for volume left to find the amount of fluid left in milliliters at 10:00 am:
Volume left (mL) = Initial volume (mL) - Volume infused (mL)
Since the initial volume is 1500 mL and the volume infused is 150 mL, plug in these values into the formula:
Volume left (mL) = 1500 mL - 150 mL
Simplify and solve for the volume left:
Volume left (mL) = 1350 mL
Therefore, the volume of fluid that will be left at 10:00 am is **1350 mL**.
Correct Answer is D
Explanation
To find the milliliters to administer, you need to use the formula for dosage calculation:
Volume (mL) = Dose ordered (mg) / Dose available (mg) x Volume available (mL)
Since the dose ordered is 275 mg, the dose available is 500 mg, and the volume available is 2 mL, plug in these values into the formula:
Volume (mL) = 275 mg / 500 mg x 2 mL
Simplify and solve for the volume:
Volume (mL) = 1.1 mL
Therefore, the nurse should administer **1.1 mL** of Primaxin to the patient.
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