The nurse receives an order to begin a dopamine (Intropin) infusion at 5 mcg/kg/min. The patient weighs 50 kg. Each milliliter of solution contains 3 mg of dopamine. How many mL/h will the nurse set the pump to deliver?
A) 3 mL/h
B) 5 mL/h
C) 3,000 mL/h
D) 83.3 mL/h
B
Feedback:
To calculate this dosage, multiply the ordered mcg by the weight (5 ×50 kg) to yield mcg/min (250 mcg/min) and then multiply this times 60 to get mcg/h (250 ×60 = 15,000 mcg/h). Convert mcg/h to mg/h (15,000/1,000 = 15 mg/h). Set up ratio (3 mg/1 mL = 15 mg/X mL) and cross multiply (3X = 15 mg). Divide both sides by 3 to yield 5 mL/h to deliver 5 mg/kg/min.
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