A nurse is reviewing a new prescription for dexamethasone 0.2 mg/kg/day PO in two divided doses for a child who weighs 66 lb. The amount available is dexamethasone 0.5 mg/5 mL elixir. 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 ["30"]
To calculate this, first convert the child's weight from pounds to kilograms: 66 lb * (1 kg / 2.2 lb) = 30 kg. Then, calculate the total daily dose of dexamethasone in mg: 0.2 mg/kg/day * 30 kg/day = 6 mg/day.
Since the daily dose is divided into two doses, calculate the dose per administration: 6 mg/day / 2 doses/day = 3 mg/dose.
Finally, divide the dose in mg by the concentration of the dexamethasone elixir to find the volume to administer: 3 mg / (0.5 mg/5 mL) = 30 mL/dose.
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Related Questions
Correct Answer is ["1.5"]
Explanation
7.5 mL is equivalent to 1.5 teaspoons.
To calculate this, use the conversion factor that 1 tsp is equivalent to 5 mL. So, 7.5 mL * (1 tsp / 5 mL) = 1.5 tsp.
Correct Answer is ["0.24"]
Explanation
To calculate this, first convert the infant's weight from pounds to kilograms: 21 lb * (1 kg / 2.2 lb) = 9.55 kg.
Then, calculate the total daily dose of clindamycin phosphate in mg: 15 mg/kg/day * 9.55 kg/day = 143.25 mg/day.
Since the daily dose is divided into equal doses every 6 hours, calculate the dose per administration: 143.25 mg/day / (24 hr/day / 6 hr/dose) = 35.81 mg/dose.
Finally, divide the dose in mg by the concentration of the clindamycin phosphate injection to find the volume to administer: 35.81 mg / (150 mg/mL) = 0.2387 mL/dose, which rounds to 0.24 mL when rounded to the nearest hundredth.
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