A nurse is preparing to administer digoxin 0.25 mg PO to a school-age child. Available is digoxin elixir 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.005"]
1. Determine the desired dose and the available concentration:
- Desired dose: 0.25 mg
- Available concentration: 50 mg/mL
2. Set up the calculation:
- We need to find out how many mL contain 0.25 mg of digoxin. We can use the following formula:
- (Desired Dose) / (Available Concentration) = Volume to Administer
3. Perform the calculation:
- 0.25 mg / 50 mg/mL = 0.005 mL
4. Round the answer:
- The answer is 0.005 mL.
- Since the question asks to round to the nearest whole number and use a leading zero if it applies, and not use a trailing zero, and since this number is less than 1, we add a leading zero.
- The answer is 0.005mL.
Therefore, the nurse should administer 0.005 mL of digoxin elixir.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.4"]
Explanation
Identify the given information:
Dose of ceftriaxone: 50 mg/kg
Weight of the toddler: 22 lb
Concentration of ceftriaxone: 350 mg/mL
Convert the toddler's weight from pounds to kilograms:
1 lb ≈ 0.453592 kg
Calculate the total dose of ceftriaxone in mg:
Total dose = Dose/kg x Weight (kg)
Substitute the values:
Total dose = 50 mg/kg x 22 lb x (0.453592 kg/1 lb)
Total dose ≈ 498.95 mg
Calculate the volume of ceftriaxone to be administered:
Volume = Total dose (mg) / Concentration (mg/mL)
Substitute the values:
Volume = 498.95 mg / 350 mg/mL
Volume ≈ 1.42 mL
Round the answer to the nearest tenth:
Volume ≈ 1.4 mL
Correct Answer is ["12.5"]
Explanation
Step-by-Step Solution:
Convert the child's weight from pounds to kilograms.
1 pound is= 0.453592 kilograms.
55 pounds = 55 x 0.453592 = 24.94756 kilograms.
Calculate the total dose of ibuprofen.
The prescribed dose is 10 mg/kg.
The child weighs 24.94756 kg.
The total dose = 10 mg/kg x 24.94756 kg = 249.4756 mg.
Calculate the volume of ibuprofen suspension to administer.
The available ibuprofen suspension is 100 mg/5 mL.
To find the volume, we can set up a proportion:
100 mg / 5 mL = 249.4756 mg / x mL
Cross-multiplying:
100x = 249.4756 x 5
Solving for x:
x = (249.4756 x 5) / 100 = 12.47378 mL
Round the answer to the nearest tenth.
12.5 mL.
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