Final answer:
To calculate the mg/hr the patient is receiving, divide the mg in the IV concentration by the ml in the IV, then multiply by the infusion rate in ml/hr.
Step-by-step explanation:
To calculate the amount of mg/hr the patient is receiving, you need to find the amount of mg in 1 ml of the IV solution and then multiply it by the rate of infusion in ml/hr.
The IV concentration is 50 mg in 250 ml of D5W. To find the amount of mg in 1 ml, divide 50 mg by 250 ml, which gives you 0.2 mg/ml.
Next, multiply the IV infusion rate of 6 ml/hr by the concentration of 0.2 mg/ml. This will give you the mg/hr the patient is receiving, which is 1.2 mg/hr.