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Practice Question

A client who had a knee replacement surgery and received a prescription for enoxaparin 30 mg subcutaneously every 12 hours for 10 days. The medication is available in 30 mg per 0.3 mL pre-filled syringes. How many mL should the practical nurse (PN) administer each day? (Enter numerical value only.)

Answer Choices:

Correct Answer:

0.6

Rationale:

Step-by-Step Calculation:

Given:

  1. Prescription: 30 mg subcutaneously every 12 hours
  2. Frequency: 2 times per day
  3. Available concentration: 30 mg per 0.3 mL

Step 1: Determine the volume for one dose

Dose volume = Prescribed dose ÷ Concentration

Dose volume = 30 mg ÷ (30 mg / 0.3 mL) = 0.3 mL per dose

Step 2: Calculate total volume per day

Total daily volume = Dose volume × Number of doses per day

Total daily volume = 0.3 mL × 2 = 0.6 mL

Educational Insight:

This calculation ensures accurate administration of enoxaparin, a low molecular weight anticoagulant, which is dosed based on fixed amounts rather than weight in many postoperative cases. Understanding how to convert dose to volume based on available concentration and frequency is essential to ensure proper anticoagulant coverage and prevent complications like thrombosis or hemorrhage.

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This question is from HESI PN EXIT (IV) which contains 149 questions.

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HESI PN EXIT (IV)

149 Questions

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Question Details
  • Category: LPN - Nursing Exam(s)
  • Subcategory: Exit Exams
  • Domain: HESI Exit - LPN
  • Answer Choices: 1
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