Use the low-dose range of 0.5-2 mcg/kg/minute to determine the appropriate dose range of dopamine that would result in vasodilation and increased renal blood flow for a patient who weighs 220 pounds.

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At low doses (0.5-2.0 mcg/kg/minute), dopamine stimulates dopaminergic receptors in renal and mesenteric blood vessels, resulting in vasodilation and increased renal blood flow. Step 1: Convert weight in pounds to kilograms. 1 kg:2.2 lb = X:220 lb. X = 220 lb/2.2 lb per kg = 100 kg. Step 2: Determine how many micrograms per minute of drug are required for the low and high ends of the range. Low: 0.5 mcg/kg/min F1F1F1S1F1F1F10 100 kg = 50 mcg/min. High: 2 mcg/kg/min F1F1F1S1F1F1F10 100 kg = 200 mcg/min. Step 3: Convert micrograms per minute to micrograms per hour. Low: 50 mcg/min F1F1F1S1F1F1F10 60 min/hr = 3000 mcg/hr. High: 200 mcg/min F1F1F1S1F1F1F10 60 min/hr = 12,000 mcg/hr. Step 4: Convert micrograms per hour to milligrams per hour. Low: 3000 mcg/hr / 1000 = 3 mg/hr. High: 12,000 mcg/hr / 1000 = 12 mg/hr.

Use the Low-Dose Range of 0