ATI RN
ATI Nur223g Pediatrics Sect 2 Final Exam Questions
Extract:
A school-age child who weighs 66 lb.
Question 1 of 5
A nurse is preparing to administer digoxin 12 mcg/kg/day PO to divide equally every 12 hr to a school-age child who weighs 66 lb. Available is digoxin elixir 0.05 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: A
Rationale:
To calculate the dose of digoxin, we first need to convert the child's weight from pounds to kilograms. 66 lb is approximately 30 kg. Next, we calculate the total daily dose of digoxin, which is 12 mcg/kg/day x 30 kg = 360 mcg/day. Since the dose is divided equally every 12 hours, the dose per administration is 360 mcg divided by 2 (for twice daily dosing) = 180 mcg per dose.
To convert 180 mcg to mg, we divide by 1000, giving us 0.18 mg per dose. Since the digoxin elixir is 0.05 mg/mL, we divide 0.18 mg by 0.05 mg/mL to get 3.6 mL per dose.
Therefore, the correct answer is A: 3.6 mL. Other choices are incorrect because they do not follow the correct calculation process or are not rounded
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