A nurse is preparing to administer digoxin 0.375 mg PO daily. Available is digoxin elixir 0.05 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["7.5"]
Determine the desired dosage:
The nurse needs to administer 0.375 mg of digoxin.
Determine the volume per dose:
The digoxin elixir contains 0.05 mg per 1 mL.
The nurse needs to administer 0.375 mg per dose.
To find the volume per dose, we can set up a proportion:
0.05 mg / 1 mL = 0.375 mg / x mL
Cross-multiplying gives us:
0.05x = 0.375
Dividing both sides by 0.05, we get:
x = 7.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.8"]
Explanation
Convert the child's weight from pounds to kilograms:
There are 2.205 pounds in 1 kilogram.
68 lb = 68 lb / 2.205 lb/kg = 30.86 kg (rounded to two decimal places).
Determine the total dosage:
The child is prescribed 1.25 mg/kg of diphenhydramine.
The child weighs 30.86 kg.
The total dosage is 1.25 mg/kg x 30.86 kg = 38.575 mg.
Determine the volume per dose:
The diphenhydramine injection contains 50 mg per 1 mL.
The nurse needs to administer 38.575 mg per dose.
To find the volume per dose, we can set up a proportion:
50 mg / 1 mL = 38.575 mg / x mL
Cross-multiplying gives us:
50x = 38.575
Dividing both sides by 50, we get:
x = 0.7715 mL
Round the answer to the nearest tenth:
Rounding 0.7715 to the nearest tenth gives us 0.8 mL.
Correct Answer is ["2"]
Explanation
1. Identify the desired dose:
- The physician has ordered lidocaine 200 mg per dose.
2. Identify the concentration of the available medication:
- The available lidocaine injection is 300 mg in 3 mL. This means the concentration is 300 mg / 3 mL.
3. Calculate the volume needed to deliver the desired dose using the formula:
- Desired Dose (mg) / Available Concentration (mg/mL) = Volume to Administer (mL)
4. Calculate the available concentration in mg/mL:
- Available Concentration = 300 mg / 3 mL = 100 mg/mL
5. Plug the values into the formula:
- Volume to Administer = 200 mg / 100 mg/mL
6. Solve for the volume to administer:
- Volume to Administer = 2 mL
7. Round the answer to the nearest whole number:
- The calculated volume is already a whole number (2).
8. Apply leading zero if it applies:
- A leading zero is not needed as the answer is a whole number greater than or equal to 1.
9. Ensure no trailing zero is used:
- The answer is 2, with no trailing zero.
Answer: The nurse should administer 2 mL per dose.
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