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A patient weighing 176 lb is to receive a dopamine continuous intravenous (IV) infusion at 5 mcg/kg/min. The solution strength available is 400 mg in 500 mL D5W. The nurse will infuse the medication at which rate?

a) 30 mL/hr
b) 40 mL/hr
c) 20 mL/hr
d) 50 mL/hr

Answer :

Final answer:

To calculate the rate of dopamine IV infusion, convert the patient's weight to kg and calculate the infusion rate using the prescribed dosage. The nurse should infuse the medication at a rate of approximately 50 mL/hr.

Explanation:

To calculate the rate of dopamine IV infusion for a patient, we need to determine the patient's weight in kg and then calculate the infusion rate.

First, we convert the patient's weight from lb to kg. Using the conversion factor 1 lb = 0.4536 kg, we find that the patient weighs approximately 79.8 kg.

Next, we calculate the infusion rate by multiplying the patient's weight in kg (79.8) by the prescribed dosage (5 mcg/kg/min). This gives us a rate of 399 mcg/min. To find the infusion rate in mL/hr, we need to convert mg to mcg and divide by the solution strength. Taking into account the solution strength of 400 mg in 500 mL, we find that the nurse should infuse the medication at a rate of approximately 50 mL/hr.

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