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.)

Answer and Explanation

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.

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Correct Answer is ["1"]

Explanation

The conversion of milliliters to teaspoons is a common calculation in medical dosing. For the administration of 5 mL of digoxin elixir PO, the equivalent in teaspoons would be approximately 1.01442 teaspoons. When rounding to the nearest whole number, as per medical dosing guidelines which often require precise measurements to ensure safety, the amount would be 1 teaspoon. It's important to use a leading zero if it applies to indicate less than one, and not to use a trailing zero as it could be mistaken for a larger dose. Therefore, the nurse should recognize that 5 mL is equivalent to 1 teaspoon.

Correct Answer is ["0.2"]

Explanation

To calculate the amount of enoxaparin to administer, you would use the formula: (desired dose ÷ available dose) × available volume. For this scenario, it would be (20 mg ÷ 30 mg) × 0.3 mL, which equals 0.2 mL.

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Naxlex Comprehensive Predictor Exams

A nurse is preparing to administer 5 mL of digoxin elixir PO to a toddler. The nurse should recognize that this is equivalent to how many tsp? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer is ["1"]

Explanation

A nurse is preparing to administer enoxaparin 20 mg subcutaneously to a school-age child. The amount available is enoxaparin 30 mg/0.3 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.)

Correct Answer is ["0.2"]

Explanation

A nurse is preparing to administer 0.9% sodium chloride 1,000 mL IV to infuse over 12 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

A nurse is preparing to administer methylphenidate 10 mg PO. Available is methylphenidate oral solution 5 mg/tsp. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

A nurse is preparing to administer dimercaprol 3 mg/kg IM to an adolescent who weighs 79 lb. Available is dimercaprol injection 100 mg/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.)

A nurse is preparing to administer filgrastim 10 mcg/kg subcutaneous to a child who weighs 71 lb. Available is filgrastim injection 300 mcg/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.)

A nurse is reviewing a prescription for nystatin 200,000 units in a troche PO 4 times per day. How should the nurse interpret this prescription?