A nurse is preparing to administer digoxin 30 mcg/kg/day PO divided in equal doses every 8 hr to a school-age child who weighs 38 lb. Available is digoxin elixir 0.05 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["3"]
To calculate the dosage of digoxin for the child, first convert the child's weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The child weighs 38 pounds, which is approximately 17.27 kilograms (38 / 2.2 = 17.27). Next, calculate the total daily dose in micrograms by multiplying the child's weight in kilograms by the prescribed dose (17.27 kg * 30 mcg/kg/day = 518.1 mcg/day). Since the dose is divided into three equal parts to be given every 8 hours, divide the total daily dose by 3 (518.1 mcg/day / 3 = 172.7 mcg/dose). Now, convert the dose from micrograms to milligrams (172.7 mcg/dose * 0.001 = 0.1727 mg/dose). Finally, to find out how many milliliters of digoxin elixir to administer per dose, divide the dose in milligrams by the concentration of the elixir (0.1727 mg/dose / 0.05 mg/mL = 3.454 mL/dose). Rounding to the nearest whole number, the nurse should administer 3 mL per dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
To calculate the volume of penicillin G benzathine injection required, divide the prescribed dose by the concentration available. In this case, 1,200,000 units prescribed divided by 600,000 units per mL results in 2 mL.
Correct Answer is ["1.5"]
Explanation
To administer the correct dose of hydrocortisone, which is 7.5 mg, when only 5 mg tablets are available, the nurse would need to give one and a half tablets to achieve the desired dose. 7.5 mg divided by 5 mg per tablet equals 1.5 tablets.
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