A healthcare provider orders 500 mg of amoxicillin. The available solution is 250 mg per 5 mL. How many mL should the nurse prepare using the ratio and proportion method?
10 mL
5 mL
15 mL
20 ml
The Correct Answer is A
Ordered Dose: 500 mg
Available Concentration: 250 mg per 5 mL
- Calculate the volume to administer using ratio and proportion
Volume to administer = (Ordered Dose ÷ Concentration) × Volume of Concentration
Volume to administer = (500 ÷ 250) × 5
Volume to administer = 2 × 5
Volume to administer = 10 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Calculation:
- Identify the desired dose and the available dose
Desired Dose: 75 mg
Available Dose: 150 mg per tablet
- Apply the Desired ÷ Have method
Number of Tablets = Desired ÷ Have
Number of Tablets = 75 ÷ 150
Number of Tablets = 0.5 tablets
Correct Answer is C
Explanation
A. Deltoid muscle: The deltoid is primarily used for intramuscular injections, not subcutaneous injections. Using it for subcutaneous medication may result in improper absorption and increased discomfort.
B. Forearm: The forearm is generally reserved for intradermal injections, such as allergy or tuberculosis testing, and is not ideal for subcutaneous medication due to limited subcutaneous tissue.
C. Abdomen: The abdomen is the preferred site for subcutaneous injections because it has a large, easily accessible layer of adipose tissue, allowing consistent and predictable absorption of medications like insulin and heparin.
D. Vastus lateralis: The vastus lateralis muscle, located in the thigh, is typically used for intramuscular injections. It is not preferred for subcutaneous administration as absorption may be less consistent.
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