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.)
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
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.4"]
Explanation
Step-by-Step Calculation
Understanding the Problem
We need to administer 2000 units of heparin.
The available concentration of heparin is 5000 units/mL.
We need to find the volume to administer.
Calculations
Set up a proportion:
5000 units / 1 mL = 2000 units / x mL
Cross-multiply:
5000x = 2000
Solve for x:
x = 2000 / 5000
x = 0.4 mL
The nurse should administer 0.4 mL of heparin.
Correct Answer is D
Explanation
A) 32 units: This calculation only includes the 14 units of regular insulin and a portion of the NPH insulin. The total units of insulin required are not 32 but rather the sum of both regular and NPH insulins.
B) 28 units: This amount represents only the units of NPH insulin and does not include the regular insulin, which is also prescribed.
C) 14 units: This amount represents only the units of regular insulin and does not include the NPH insulin, which is also prescribed.
D) 42 units: The total number of insulin units required is the sum of the regular insulin (14 units) and the NPH insulin (28 units), which equals 42 units. This total should be prepared in the insulin syringe to ensure the correct dosage is administered.
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