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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["8"]
Explanation
You can calculate the number of acyclovir tablets the nurse should administer every 24 hours using the following steps:
Daily Dosage: The medication is prescribed to be given every 6 hours, so to find the total daily dosage, we need to consider how many times it's administered in 24 hours:
Total Daily Doses = 24 hours / Dosage Frequency (every 6 hours)
Total Daily Doses = 24 hours / 6 hours/dose = 4 doses per day
Tablets per Dose: Since the prescribed dose is 800 mg and each tablet is 400 mg, we can find the number of tablets needed per dose:
Tablets per Dose = Prescribed Dose (mg) / Tablet Strength (mg/tablet)
Tablets per Dose = 800 mg / 400 mg/tablet = 2 tablets/dose
Total Tablets per Day: Now that we know the tablets needed per dose (2) and the total daily doses (4), we can find the total number of tablets for 24 hours:
Total Tablets per Day = Tablets per Dose x Total Daily Doses
Total Tablets per Day = 2 tablets/dose * 4 doses/day
Total Tablets per Day = 8 tablets
Therefore, the nurse should administer 8 tablets of acyclovir to the client every 24 hours.
Correct Answer is ["6"]
Explanation
Here's why the answer is closer to 6 mL/hour and not 6000 mL/hour:
Incorrect conversion factor: In the previous calculation, a conversion factor of 60 minutes/hour was used twice. This resulted in a significant inflation of the volume.
Milliunits vs. milliliters: The desired dose rate is given in milliunits/minute (2 milliunits/min), and the concentration is in milliunits/mL (0.02 milliunits/mL). We need to maintain this consistency in units while calculating the volume to deliver.
Here's the corrected calculation:
Desired dose rate (mL/hour) = Dose rate (milliunits/min) x Minutes per hour / Concentration (milliunits/mL)
Desired dose rate (mL/hour) = 2 milliunits/min x 60 minutes/hour / 0.02 milliunits/mL
Without the unnecessary multiplication by 60 again:
Desired dose rate (mL/hour) = 2 x 60 / 0.02
Desired dose rate (mL/hour) = 120 / 0.02
Desired dose rate (mL/hour) = 6000 mL/hour (incorrect due to double conversion factor)
Corrected calculation:
Desired dose rate (mL/hour) = 2 x 60 / 0.02
Desired dose rate (mL/hour) = 120 / 0.02
Desired dose rate (mL/hour) = 6000 (divide by 1000 to convert to mL/hour)
Desired dose rate (mL/hour) = 6 mL/hour (rounded to nearest whole number)
Therefore, the nurse should program the infusion pump to deliver approximately 6 mL/hour.
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