Wgu Hesi dosage calculation proctored exam ( 52 Questions)
The healthcare provider prescribes a loading dose of digoxin 0.6 mg intravenously (IV) for a client with heart failure (HF). The nurse obtains digoxin Injection 500 mcg in 2 mL vial from the electronic medication system. How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)
Correct Answer: 2.4
Rationale: Step 1 is to identify the ordered dose and the available dosage strength Ordered Dose: 0.6 mg Available Strength: 500 mcg / 2 mL
Step 2 is to convert the ordered dose from milligrams (mg) to micrograms (mcg) Conversion factor = 1000 mcg per 1 mg Ordered dose in mcg = 0.6 × 1000 0.6 × 1000 = 600 Ordered dose in mcg = 600 mcg
Step 3 is to calculate the volume to administer in milliliters (mL) Volume to administer = (Ordered Dose ÷ Available Dose) × Available Volume Volume to administer = (600 ÷ 500) × 2 600 ÷ 500 = 1.2 1.2 × 2 = 2.4 Volume to administer = 2.4 mL
Step 4 is to round to the nearest tenth 2.4 = 2.4 Answer: 2.4
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