HESI RN
WGU HESI Med Surg Questions
Extract:
Question 1 of 5
Dobutamine hydrochloride 2 mcg/kg/min is prescribed for a client weighing 165 pounds. The solution is mixed with 50 mg of dobutamine in 1,000 mL of D5W. The nurse should set the infusion pump to deliver how many mL/hour? (Enter numeric value only.)
Correct Answer: 180
Rationale:
To find the answer, we can use the following steps: Convert the client's weight from pounds to kilograms by dividing by 2.2. Calculate the dosage of dobutamine in mg/hour by multiplying the weight in kg by the rate in mcg/kg/min and by 60. Divide the dosage of dobutamine in mg/hour by the concentration of dobutamine in the solution in mg/mL. Round the result to the nearest whole number. Using these steps, we get: (weight in kg) = (165) / (2.2) = 75 kg. (dose in mg/hour) = (2) x (75) x (60) = 9000 mcg/hour. (dose in mg/hour) = (9000 x 10^-3) = 9 mg/hour. (volume in mL/hour) = (9) / (50 / 1000) = 180 mL/hour.
Therefore, the nurse should set the infusion pump to deliver 180 mL/hour of dobutamine hydrochloride in D5W.
Question 2 of 5
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