A nurse is preparing to administer methylprednisolone 7 mg/kg/day IM in two divided doses to a school-age child who weighs 64 lb. Available is methylprednisolone 20 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["5.1"]
To calculate the correct dose of methylprednisolone, we need to follow these steps:
-
Convert pounds to kilograms:
- 64 lb * 0.4536 kg/lb = 29 kg
-
Calculate the daily dose in milligrams:
- 7 mg/kg/day * 29 kg = 203 mg/day
-
Calculate the dose per administration:
- Since the medication is divided into two doses, divide the daily dose by 2:
- 203 mg/day / 2 = 101.5 mg/dose
- Since the medication is divided into two doses, divide the daily dose by 2:
-
Determine the volume needed from the available concentration:
- 101.5 mg * (1 mL / 20 mg) = 5.075 mL
Therefore, the nurse should administer 5.1 mL of methylprednisolone per dose.
Answer: 5.1 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.8"]
Explanation
1. Convert client's weight to kilograms (kg):
Weight (kg) = 154 lb x 0.453592 kg/lb (conversion factor)
Weight (kg) ≈ 70.31 kg (rounded to two decimal places)
2. Calculate the total gentamicin dosage:
Dosage (mg/kg) = 1 mg/kg (given)
Weight (kg) = 70.31 kg (calculated)
Total dosage (mg) = Dosage (mg/kg) x Weight (kg)
Total dosage (mg) = 1 mg/kg x 70.31 kg
Total dosage (mg) ≈ 70.31 mg (rounded to two decimal places)
3. Determine the volume to administer based on medication concentration:
Concentration (mg/mL) = 40 mg/mL (available gentamicin solution)
Total dosage (mg) = 70.31 mg (calculated)
Volume (mL) = Dosage (mg) / Concentration (mg/mL)
Volume (mL) = 70.31 mg / 40 mg/mL
4. Round the answer to the nearest tenth:
Volume to administer ≈ 1.76 mL (rounded to two decimal places)
Therefore, the nurse should administer approximately 1.8 mL of gentamicin solution.
Correct Answer is ["201"]
Explanation
Here’s the calculation:
To convert from kilograms to pounds, you multiply the weight in kilograms by 2.20462,
since there are approximately 2.20462 pounds in 1 kilogram. So:
91kg × 2.20462 = 200.62lb
When rounded to the nearest whole number, this becomes 201 lb.
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