A premature infant with a birth weight of 1,200 grams is receiving beractant 120 mg intratracheal every 6 hours. Single use vials of beractant are labeled, "100 mg/4 mL." How many mL should the nurse administer? (Enter the numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["4.8"]
The vial is labeled as “100 mg per 4 mL.”
This means that each mL contains 25 mg of the medication (100 mg / 4 mL = 25 mg/mL).
The nurse needs to administer 120 mg of the medication.
To find out how many mL this is, we divide the dose by the concentration:
Volume in mL = 120 mg / 25 mg/mL = 4.8 mL
If rounding is required to the nearest tenth, the nurse should administer 4.8 mL of the medication.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["20"]
Explanation
First, we need to find out how many mL of the solution contains 10 units of insulin, which is the prescribed rate per hour.
Given:
The solution contains 50 units of insulin in 100 mL.
The prescription rate is 10 units/hour.
We can set up the proportion as follows:
10units/ xmL = 50units/100mL
Solving for x gives us the volume in mL that contains 10 units of insulin.
Cross-multiplying and solving for x:
X = 10units×100mL/50units
After performing the calculation, we find that x equals 20 mL.
So, the nurse should program the infusion pump to deliver 20 mL/hr. This is because 20 mL of the solution contains the prescribed 10 units of insulin.
Correct Answer is ["100"]
Explanation
Here's how to calculate the infusion rate (mL/hour) for the nurse to administer cefazolin:
We know:
Total volume of solution: 50 mL (given)
Dose of cefazolin: 1 gram (given) = 1000 milligrams (since 1 gram = 1000 milligrams)
Infusion duration: 30 minutes (given) = 0.5 hours (convert minutes to hours by dividing by 60)
We need to find:
Infusion rate (mL/hour)
Calculation:
Calculate the concentration of cefazolin in the solution (not required, but helpful to understand):
We aren't directly given the concentration, but we can see that 1 gram of cefazolin is delivered in 50 mL. Therefore, the concentration is:
Concentration = Dose (mg) / Volume (mL)
Concentration = 1000 mg / 50 mL
Concentration = 20 mg/mL
Calculate the infusion rate based on the total volume and duration:
Infusion rate (mL/hour) = Total volume (mL) / Infusion time (hours)
Infusion rate (mL/hour) = 50 mL / 0.5 hours
Infusion rate (mL/hour) = 100 mL/hour
Since we typically round infusion rates to whole numbers for ease of use with infusion pumps, the nurse should program the pump to deliver 100 mL/hour.
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