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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.)
Answer and Explanation

The Correct Answer is ["5.1"]

To calculate the correct dose of methylprednisolone, we need to follow these steps:

  1. Convert pounds to kilograms:

    • 64 lb * 0.4536 kg/lb = 29 kg

  2. Calculate the daily dose in milligrams:

    • 7 mg/kg/day * 29 kg = 203 mg/day

  3. 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

  4. 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


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Related Questions

Correct Answer is ["3"]

Explanation

The nurse should administer 3 tablets of bumetanide.

Here's the breakdown:

Desired dose: 1.5 mg

Strength of available tablets: 0.5 mg per tablet

We can find the number of tablets needed by dividing the desired dose by the amount of medication in each tablet and rounding to the nearest whole number:

Number of tablets (rounded) = Desired dose / Medication per tablet

= 1.5 mg / 0.5 mg/tablet

= 3 tablets (rounded to nearest whole number)

Correct Answer is ["1.1"]

Explanation

The nurse can determine the volume of cefazolin to administer based on the available information:

1. Reconstituted concentration: The cefazolin is reconstituted to a concentration of 225 mg/mL.

2. Dosage required: The nurse needs to administer 250 mg of cefazolin.

3. Volume calculation: We can use the following formula to find the volume to administer:

Volume (mL) = Dosage (mg) / Concentration (mg/mL)

Volume (mL) = 250 mg / 225 mg/mL

4. Rounding the answer: Round the answer to the nearest tenth of a milliliter.

Volume (mL) = 1.1 mL (rounded to one decimal place)

Therefore, the nurse should administer 1.1 mL of the reconstituted cefazolin solution.

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