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A nurse is preparing to administer dexamethasone 0.5 mg/kg/day IM to divide equally every 6 hr to a client who weighs 132 lb. Available is dexamethasone 4 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 ["1.9"]

To calculate the dose of dexamethasone, we need to convert the client's weight from  pounds to kilograms. One pound is equal to 0.454 kg, so 132 lb is equal to 132 x 0.454 =  59.928 kg. The prescribed dose is 0.5 mg/kg/day, so the daily dose is 0.5 x 59.928 =  29.964 mg. This dose is divided equally every 6 hours, so the dose per administration is  29.964 / 4 = 7.491 mg. The concentration of the drug is 4 mg/mL, so the volume per  administration is 7.491 / 4 = 1.873 mL. Rounded to the nearest tenth, the nurse should  administer 1.9 mL per dose.


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Related Questions

Correct Answer is ["3.5"]

Explanation

  1. Convert the client's weight from pounds to kilograms:

    • 154 lb ÷ 2.2 lb/kg = 70 kg

  2. Calculate the total dose required:

    • 0.25 mg/kg × 70 kg = 17.5 mg

  3. Determine the volume to administer:

    • Given concentration: 5 mg/mL
    • 17.5 mg ÷ 5 mg/mL = 3.5 mL

  4. Rounding to the nearest tenth:

    • The answer remains 3.5 mL

So the nurse should administer 3.5 mL of diltiazem IV injection.

which is 17.5 mg / 5 mg/mL = 3.5 mL. Rounding to the nearest tenth, the nurse should administer 3.5 mL of diltiazem IV injection.

Correct Answer is ["60"]

Explanation

To calculate the infusion rate of lidocaine, we need to convert the dose from mg/min to mg/hr and then to mL/hr.

The prescribed dose is 4 mg/min, so the hourly dose is 4 x 60 = 240 mg/hr.

The concentration of the drug is 1 g in 250 mL, which is equivalent to 1000 mg in 250 mL or 4 mg in 1 mL.

Therefore, the volume per hour is 240 / 4 = 60 mL/hr.

Rounded to the nearest whole number, the nurse should set the IV pump to deliver 60 mL/hr.

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