Difficulty: Medium
Average Score: 88%
Simulated
A nurse is preparing to administer methylprednisolone acetate (Depo-Medrol) 10 mg by IV bolus. The amount available is 40 mg/mL. How many mL should the nurse administer?
Correct answer
0.3
Rationale
Correct Answer: 0.3 mL
Rationale:
1. Calculate the total dose needed: 10 mg.
2. Determine the concentration: 40 mg/mL.
3. Use the formula: dose needed / concentration available = volume to administer.
4. Plug in the values: 10 mg / 40 mg/mL = 0.25 mL.
5. Round up to the nearest practical dose increment: 0.3 mL.
Summary:
Choice A (0.5 mL): Incorrect, as it does not accurately calculate the volume needed.
Choices B-G: Irrelevant, as they do not follow the correct calculation method.
Rationale:
1. Calculate the total dose needed: 10 mg.
2. Determine the concentration: 40 mg/mL.
3. Use the formula: dose needed / concentration available = volume to administer.
4. Plug in the values: 10 mg / 40 mg/mL = 0.25 mL.
5. Round up to the nearest practical dose increment: 0.3 mL.
Summary:
Choice A (0.5 mL): Incorrect, as it does not accurately calculate the volume needed.
Choices B-G: Irrelevant, as they do not follow the correct calculation method.