An adolescent with meningococcal meningitis is receiving a continuous IV infusion of penicillin G, which is prescribed as 20 million units in a total volume of 2 liters of normal saline every 24 hours. The pharmacy delivers 10 million units/liter of normal saline. How many mL/hour should the nurse program the infusion pump? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
The Correct Answer is ["83"]
The nurse should set the infusion pump to deliver the entire 2 liters (2000 mL) over the course of 24 hours.
Therefore, the IV pump should be set to deliver:
Rate (mL/hr) = Total volume (mL) / Time (hr) = 2000 mL / 24 hr
After performing the calculation, we find that the rate equals 83.33 mL/hr.
So, the nurse should set the infusion pump to deliver 83 mL/hr (rounded to the nearest whole number).
This is because 83 mL of the solution contains the prescribed dose of penicillin G every hour.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["120"]
Explanation
Here's how to calculate the rate (mL/hour) for the infusion pump to deliver lidocaine 4 mg/minute:
1. Lidocaine concentration:
The medication bag contains 1 gram of lidocaine in 500 mL of dextrose 5% in water.
Convert grams to milligrams: 1 gram = 1000 milligrams
Lidocaine concentration (mg/mL) = Total lidocaine (mg) / Volume (mL)
Lidocaine concentration (mg/mL) = 1000 mg / 500 mL
Lidocaine concentration (mg/mL) = 2 mg/mL (round to nearest whole number)
2. Prescribed lidocaine dose: 4 mg/minute (given)
3. We need to find the volume delivered per hour (mL/hour) to achieve the prescribed lidocaine dose (4 mg/minute) considering the concentration (2 mg/mL) in the bag.
Infusion rate (mL/hour) = Dose (mg/minute) x Minutes per hour / Concentration (mg/mL)
However, there's a mismatch in units between dose (mg/minute) and concentration (mg/mL).
To address this, we can convert the infusion duration (minutes) to hours to match the concentration units (mg/mL).
Conversion factor: 60 minutes/hour
Infusion rate (mL/hour) = Dose (mg/minute) x (60 minutes/hour) / Concentration (mg/mL)
Infusion rate (mL/hour) = 4 mg/minute * 60 minutes/hour / 2 mg/mL
Infusion rate (mL/hour) = 120 mL/hour (round to nearest whole number)
Therefore, the nurse should program the infusion pump to deliver approximately 120 mL/hour.
Correct Answer is ["59.147"]
Explanation
Here's how to calculate the number of mL the nurse should document:
Client dosage: 2 ounces (given)
Conversion factor: 1 ounce (oz) = 29.5735 mL (conversion factor)
Magnesium hydroxide concentration: 400 mg per 5 mL (from bottle label)
We need to find the equivalent volume in mL of the 2 ounces dosage the client reported.
Steps:
a. Convert ounces to mL:
Client dosage (mL) = Client dosage (oz) x Conversion factor (mL/oz)
Client dosage (mL) = 2 oz * 29.5735 mL/oz
Client dosage (mL) = 59.147 mL (round to nearest hundredth)
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