A nurse is preparing to administer enoxaparin 5 mg/kg subcutaneous to a client who weighs 187 lb. Available is enoxaparin 60 mg/0.6 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["4.2"]
1. Convert the client’s weight from pounds to kilograms
We know: 1 lb = 0.453592 kg
Weight in kg = 187 × 0.453592187 × 0.453592
187 × 0.453592 ≈ 84.821704 kg
2. Calculate the dose in mg
Dose = 5 mg/kg × 84.821704 kg
5 × 84.821704 ≈ 424.10852 mg
3. Determine how many mL to administer
Available: 60 mg in 0.6 mL
Concentration = 60 / 0.6 = 100 mg/mL
Volume (mL) = Dose (mg) ÷ Concentration (mg/mL)
424.10852 / 100 ≈ 4.2410852 mL
4. Round to the nearest tenth
4.241 → 4.2 mL
Answer: 4.2mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["10"]
Explanation
Calculation:
Desired dose = 5 mg.
Available concentration = 2.5 mg / 5 mL.
Calculate the required volume using the formula:
Volume (mL) = Desired dose (mg) / Available concentration (mg/mL)
= 5 mg / (2.5 mg / 5 mL)
= 5 mg × (5 mL / 2.5 mg)
= (5 × 5) / 2.5 mL
= 25 / 2.5 mL
= 10 mL
Rounded to the nearest whole number: 10.
Correct Answer is D
Explanation
A. Take 250 mg by mouth twice daily: This instruction uses metric units (milligrams) to describe the medication dosage, not household measurement units.
B. Mix powder with 1 L of water and drink throughout the day: Liters are part of the metric system, commonly used in clinical settings, and do not represent household measurement units.
C. Dissolve one packet in 120 mL and drink twice daily: Milliliters are metric units. Although they may be converted for home use, they are not considered standard household units.
D. Take 1 Tbsp by mouth after every meal: This instruction uses a household unit—tablespoon (Tbsp)—which is commonly used everyday in medication instructions at home. One tablespoon is equal to 15 mL, making it a recognizable and practical measure for clients managing their medications outside of clinical settings.
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