A physician prescribes 400 mg of an oral solution that is available as 100 mg per 10 mL. How many mL does the nurse need to administer using the ratio and proportion method?
40 mL
20 mL
80 mL
60 mL
The Correct Answer is A
Calculation:
- Set up the ratio and proportion
Available dose to volume = Desired dose to unknown volume
100 mg is to 10 mL as 400 mg is to X mL
- Cross multiply to solve for X
100 × X = 400 × 10
100X = 4000
X = 40 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Calculation:
- Set up the ratio
100 mg : 2 mL = 300 mg : X mL
- Solve for X using cross-multiplication
100 × X = 2 × 300
100X = 600
X = 600 ÷ 100
X = 6 mL
Correct Answer is B
Explanation
A. Administering insulin without verifying the patient's blood glucose level: Skipping blood glucose verification increases the risk of hypoglycemia or hyperglycemia, compromising patient safety.
B. Double-checking the insulin dose with another nurse before administration: Independent verification by a second licensed nurse helps ensure the correct dose, type, and timing of insulin, reducing the risk of potentially harmful dosing errors.
C. Using the same needle for multiple insulin injections in the same patient: Reusing needles increases the risk of infection and tissue damage and does not promote safe administration practices.
D. Allowing the patient to self-administer without supervision: While patient independence is important, supervision is necessary to confirm correct technique and dosage, especially for high-alert medications like insulin.
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