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A nurse is preparing to administer digoxin 8 mcg/kg/day PO to divide equally every 12 hr for a preschooler who weighs 33 lb. Available is digoxin elixir 0.05 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 ["1.2"]

Here's how to calculate the digoxin dosage:

1. Convert the child's weight to kilograms:

  • There are approximately 2.2 pounds in 1 kilogram.
  • 33 lbs / 2.2 lbs/kg = 15 kg

2. Calculate the total daily dose:

  • The child needs 8 mcg of digoxin per kilogram of weight per day.
  • 8 mcg/kg * 15 kg = 120 mcg

3. Calculate the dose per administration:

  • The daily dose is divided into two doses (every 12 hours).
  • 120 mcg / 2 = 60 mcg

4. Convert the dose per administration to milligrams:

  • There are 1000 mcg in 1 mg.
  • 60 mcg / 1000 mcg/mg = 0.06 mg

5. Calculate the volume to administer:

  • The digoxin elixir has a concentration of 0.05 mg/mL.
  • 0.06 mg / 0.05 mg/mL = 1.2 mL


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Related Questions

Correct Answer is B

Explanation

A) 1600: If the nurse were to administer the next bag at 1600, it would imply that the current solution would need to last only 2 more hours. However, with 500 mL remaining and a total infusion time of 8 hours, this timing would not align with the need to complete the full infusion period appropriately.

B) 1800: Since the IV solution is meant to be infused over 8 hours and 500 mL (half of the total 1,000 mL) has been infused by 1400, the remaining 500 mL should also be infused over the next 4 hours. Infusing the next bag at 1800 would ensure that the entire 8-hour infusion time is met correctly.

C) 1700: Administering the next bag at 1700 would mean that there would be only 3 hours left to infuse the remaining solution. This timing would not allow for a complete 8-hour infusion period as required.

D) 1500: If the nurse were to administer the next bag at 1500, it would be too early, as only 2 hours would have passed since starting the current bag. This would not be appropriate given the need to infuse the solution over the full 8-hour period.

Correct Answer is ["125"]

Explanation

Step-by-Step Calculation

Understanding the Problem

We need to administer 1000 mL of 0.9% sodium chloride over 8 hours.

We need to calculate the infusion rate in mL/hr.

Calculations

Calculate the infusion rate:

Infusion rate (mL/hr) = Total volume (mL) / Time (hr)

Infusion rate = 1000 mL / 8 hr = 125 mL/hr

The nurse should set the IV pump to deliver 125 mL/hr.

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