A nurse is preparing to administer ephedrine 3 mg/kg/day IV bolus divided in equal doses every 6 hr to a school-age child who weighs 70 lb. Available is ephedrine injection 50 mg/mL. How many mL should the nurse administer per dose?
(Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.48"]
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 0.48 mL when rounded to the nearest hundredth.
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Related Questions
Correct Answer is ["125"]
Explanation
To find out how many mL/hr the IV pump should be set to deliver, we need to divide the total volume of the infusion by the infusion time in hours.
If 1,000 mL of 0.45% sodium chloride is to be infused over 8 hours, then the rate of infusion is 1,000/8 = 125 mL/hr.
The answer is rounded to the nearest whole number as instructed.
Correct Answer is ["1"]
Explanation
1 Tablespoon = 15mls
therefore, the nurse should administer 1 Tablespoon
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