ATI LPN
ATI LPN Pharmacology Exam Questions
Extract:
Question 1 of 5
A nurse is preparing to administer dopamine 3mcg/kg/min by continuous IV infusion to a preschooler who weighs 41.8 bs. Available is dopamine 400 mg in dextrose 596 in water (D5W) 250 mL. The nurse should set the IV pump to deliver how many ml/hr? (Round to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: A
Rationale:
To calculate the IV pump rate for dopamine infusion, first, calculate the total dose required: 3mcg/kg/min x 41.8 lbs = 3mcg/kg/min x 18.98 kg = 56.94 mcg/min.
Then convert mcg to mg: 56.94 mcg/min ÷ 1000 = 0.05694 mg/min. Since there are 400 mg of dopamine in 250 mL, the rate would be: 0.05694 mg/min ÷ 400 mg/250 mL = 0.05694 mg/min x 250 mL / 400 mg = 0.0356 mL/min = 2.1 mL/hr (rounded to the nearest tenth).
Therefore, the correct answer is A: 2.1 mL/hr. Other choices are incorrect as they do not result from the accurate dosage calculation.
Question 2 of 5
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Question 3 of 5
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Question 4 of 5
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Question 5 of 5
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