A nurse is preparing to administer a liquids medication prescribed as 3 teaspoons. What is the most accurate metric equivalent for this dosage?
15 mL
20 mL
30 mL
10 mL
The Correct Answer is A
A. 15 mL: One teaspoon is equivalent to 5 mL in the metric system. Therefore, 3 teaspoons equal 3 × 5 mL = 15 mL. This ensures accurate dosing and patient safety.
B. 20 mL: Twenty milliliters would exceed the prescribed dose, resulting in a potential overdose if administered.
C. 30 mL: Thirty milliliters corresponds to 6 teaspoons or 2 tablespoons, which is double the prescribed 3 teaspoons and would be unsafe.
D. 10 mL: Ten milliliters equals 2 teaspoons, which is less than the prescribed amount, leading to underdosing and ineffective therapy.
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Related Questions
Correct Answer is C
Explanation
A. Use fractions instead of decimals: Fractions can be confusing and prone to misinterpretation, increasing the risk of medication errors rather than minimizing them.
B. Write the unit abbreviation before the amount: Standard practice is to write the numeric amount first, followed by the unit (e.g., 5 mL), to avoid confusion and ensure clarity.
C. Avoid using trailing zeros after decimal points: Trailing zeros (e.g., 5.0 mg) can lead to tenfold dosing errors if misread. Omitting unnecessary zeros (e.g., 5 mg) enhances accuracy and reduces the risk of medication errors.
D. Always use Roman numerals for clarity: Roman numerals are not used in medication dosing because they are easily misinterpreted and do not improve clarity; they can increase the risk of errors.
Correct Answer is C
Explanation
A. Mix both insulins in the vial before drawing them up: Mixing insulins directly in the vial is unsafe and can alter their pharmacokinetics, potentially causing unpredictable blood glucose control.
B. It does not matter which insulin is drawn up first: The order of drawing up insulins matters because improper sequence can contaminate the short-acting insulin with intermediate-acting insulin, affecting onset and duration of action.
C. Draw up regular insulin first, then NPH insulin: Regular insulin (short-acting) should always be drawn up before NPH insulin (intermediate-acting) to prevent contaminating the regular insulin with NPH, maintaining the intended onset and duration of both insulins.
D. Draw up NPH insulin first, then regular insulin: Drawing up NPH first increases the risk of contaminating the short-acting insulin with intermediate-acting insulin, which can delay its onset and compromise glycemic control.
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