Calculate the maximum flow rate for this patient.

Ordered: Dopamine infusion of 2 mcg/kg/min for bradycardia and systolic BP less than 90. Increase infusion up to 10 mcg/kg/min as needed.

You have a premixed bag of dopamine with 250 mg in 500 mL of D5W. The patient weighs 185 lb.

Determine the flow rate in mL/h.

Question

27-10-2024
Medicine

College

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Calculate the maximum flow rate for this patient.

Ordered: Dopamine infusion of 2 mcg/kg/min for bradycardia and systolic BP less than 90. Increase infusion up to 10 mcg/kg/min as needed.

You have a premixed bag of dopamine with 250 mg in 500 mL of D5W. The patient weighs 185 lb.

Determine the flow rate in mL/h.

Answer :

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TaylorSmith778 TaylorSmith778 · Answer 1 · 2024-11-04T22:11:01-05:00

Final answer:

To calculate the maximum flow rate for this dopamine infusion, first convert the patient's weight to kg, then determine the dopamine concentration in the IV bag. After that, use the ordered rate of 10 mcg/kg/min to calculate the necessary dose in mcg/min for this specific patient. Lastly, calculate the final flow rate in mL/hr, which comes out to 99.9 mL/hr.

Explanation:

The first step in calculating the maximum flow rate for this dopamine infusion is to convert the patient's weight from lb to kg. Seeing as 1 lb = 0.45 kg, this patient weighs 185 lbs * 0.45 = 83.25 kg. Next, we need to calculate the concentration of dopamine in the IV bag. We've been told it contains 250 mg in 500 mL, so the concentration is 500 mcg/mL (as there are 1,000 mcg in 1 mg). The ordered rate is 10 mcg/kg/min at its highest, so for this patient, that would be 10 mcg/kg/min * 83.25 kg = 832.5 mcg/min. Lastly, we calculate the final flow rate in mL/hr: (832.5 mcg/min) /(500 mcg/mL) * 60 min/hr = 99.9 mL/hr.

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