A nurse is preparing to administer vancomycin 20 mg/kg by intermitent IV bolus every 8 hr to a child who weighs 64 lb. The amount available is vancomycin injection 50 mg/mL. How many mL of vancomycin should the child receive per dose? (Round the answer to the nearest tenth. Use a leading zero if applicable. Do not use a trailing zero.)
The Correct Answer is ["11.6"]
To calculate this, first convert the child's weight from pounds to kilograms: 64 lb * (1 kg / 2.2 lb) = 29.09 kg. Then, calculate the dose of vancomycin in mg: 20 mg/kg * 29.09 kg = 581.8 mg.
Finally, divide the dose in mg by the concentration of the vancomycin injection to find the volume to administer: 581.8 mg / (50 mg/mL) = 11.636 mL/dose, which rounds to 11.6 mL when rounded to the nearest tenth.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.2 mL"]
Explanation
To find out how many mL of enoxaparin the nurse should administer, we need to set up a proportion. If 30 mg of enoxaparin is equivalent to 0.3 mL, then 20 mg of enoxaparin is equivalent to x mL.
The proportion can be writen as 30/0.3 = 20/x. Solving for x, we get x = (20 * 0.3) / 30 = 0.2 mL.
Correct Answer is ["0.48"]
Explanation
To calculate this, first convert the child's weight from pounds to kilograms: 70 lb * (1 kg / 2.2 lb) = 31.82 kg. Then, calculate the total daily dose of ephedrine in mg: 3 mg/kg/day * 31.82 kg/day = 95.45 mg/day.
Since the daily dose is divided into equal doses every 6 hours, calculate the dose per administration: 95.45 mg/day / (24 hr/day / 6 hr/dose) = 23.86 mg/dose.
Finally, divide the dose in mg by the concentration of the ephedrine injection to find the volume to administer: 23.86 mg / (50 mg/mL) = 0.477 mL, which rounds to 0.48mL when rounded to the nearest hundredth.
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