Which rule should be followed when writing metric notations for medication dosages?
Use a leading zero before a decimal point
Write fractions instead of decimals
Place the unit of measurement before the number
include a trailing zero after a whole number
The Correct Answer is A
A. Use a leading zero before a decimal point: A leading zero (e.g., 0.5 mg) prevents misinterpretation of the decimal as a whole number, reducing the risk of tenfold dosing errors and promoting safe medication administration.
B. Write fractions instead of decimals: Fractions are prone to misinterpretation and calculation errors, making them unsafe for documenting medication dosages.
C. Place the unit of measurement before the number: Standard practice places the numeric value first, followed by the unit (e.g., 5 mL), to ensure clarity and prevent confusion.
D. Include a trailing zero after a whole number: Trailing zeros (e.g., 5.0 mg) are unsafe because they can be misread as ten times the intended dose; they should be avoided in medication notation.
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Related Questions
Correct Answer is B
Explanation
A. 10 mL syringe: A 10 mL syringe is too large for a 1.5 mL intramuscular injection. Using a larger syringe reduces measurement accuracy and increases the risk of dosing errors.
B. 3 mL syringe: A 3 mL syringe is ideal for intramuscular injections ranging from 1 to 3 mL. It provides accurate measurement, allows safe administration, and is standard practice for most IM medications.
C. 1 mL syringe: A 1 mL syringe is too small for a 1.5 mL dose. Using it would require multiple injections, increasing patient discomfort and error risk.
D. 5 mL syringe: While a 5 mL syringe can hold the volume, it is larger than necessary. Using a smaller syringe like a 3 mL provides better accuracy and control for the 1.5 mL dose.
Correct Answer is D
Explanation
A. 2 tablespoons: Two tablespoons equal 30 mL, which would double the prescribed dose. Giving this amount could lead to overdosing and increase the risk of adverse effects.
B. 1 teaspoon: One teaspoon is equivalent to 5 mL. This would provide only one-third of the prescribed 15 mL dose, resulting in underdosing and reduced therapeutic effect.
C. 1/2 tablespoon: Half a tablespoon equals 7.5 mL, which is only half of the ordered dose. This amount would not meet the prescribed medication requirement.
D. 1 tablespoon: One tablespoon is equal to 15 mL. This directly matches the prescribed dose and is the correct household measurement for accurate medication administration.
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