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The health care provider orders chlorpromazine 25 mg IM. The drug is supplied as chlorpromazine 50 mg/mL in a 1-mL ampule. How much would the nurse administer?
- A. 0.25 mL
- B. 0.5 mL
- C. 0.75 mL
- D. 1.0 mL
Correct Answer: B
Rationale: The drug is supplied as 50 mg in 1 mL. Calculating the dosage using the formula D / H ? Q, the equation would read: 25 mg / 50 mg ? 1 mL = 0.5 mL.
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The nurse is checking the dosage of a drug ordered in mg/ kg. A client weighs 275lb. The client weighs kilograms.
- A. 100 kg
- B. 125 kg
- C. 150 kg
- D. 175 kg
Correct Answer: B
Rationale: Pounds must be converted to kilograms using the conversion factor of 2.2 lb in 1 kg. Therefore, 275 / 2.2 = 125.
A group of nursing students are reviewing the various systems of measurement. The students demonstrate understanding of the information when they identify which of the following as a metric system unit? Select all that apply.
- A. Inch
- B. Milligram
- C. Centimeter
- D. Ounce
- E. Pound
Correct Answer: B,C
Rationale: The metric system uses the gram, liter, and meter. Milligram and centimeter are metric units.
When assessing a client's temperature, the nurse finds it to be 99°C. The client's temperature is degrees Celsius.
- A. 36.0°C
- B. 37.2°C
- C. 38.4°C
- D. 39.6°C
Correct Answer: B
Rationale: To convert Fahrenheit to Celsius, the formula C = 5/9 ? (F - 32) is used. Therefore, 99 - 32 = 67, and 67 ? 5/9 = 37.2.
A nursing instructor is describing how to perform dosage calculations using dimensional analysis. Which of the following would the instructor emphasize to ensure accuracy?
- A. A formula that is specific to the drug being administered is needed.
- B. Decimals rather than fractions are used to determine amounts.
- C. Proportions are needed but labels related to units are not important.
- D. The focus is on the unit of measure set up in a specific order.
Correct Answer: D
Rationale: Dimensional analysis is a method used to perform calculations where the focus is on the units of measure, thereby eliminating the need to memorize equations. Because the units are set up in a specific order, it eliminates the need to be concerned about setting up proportions correctly. When using DA to calculate dosage problems, dosages are written as common fractions.
A nurse is checking the label of a drug. Which of the following would the nurse identify as an important item needed to administer a drug? Select all that apply.
- A. Monitoring parameters
- B. Side effects
- C. Dosage form
- D. Drug name
- E. Dosage strength
Correct Answer: C,D,E
Rationale: Although drug labels contain a great amount of information about the drug being given, three specific items are needed to administer a drug: the drug name, dosage form, and dosage strength.