A patient weighing 220 lbs is ordered to receive IV heparin at 20 units/kg/hour. How many units should he receive each hour?

To determine the correct dose of IV heparin for a patient weighing 220 lbs, the first step is to convert the patient's weight from pounds to kilograms, since the dosage is calculated in units per kilogram per hour. The conversion factor from pounds to kilograms is 1 kg equals approximately 2.2 lbs.

To find the weight in kilograms, you can use the following calculation:

[

\text{Weight in kg} = \frac{\text{Weight in lbs}}{2.2} = \frac{220 \text{ lbs}}{2.2} \approx 100 \text{ kg}

]

Next, since the dosage is prescribed at 20 units of heparin per kilogram per hour, you would multiply the patient's weight in kilograms by the units per kilogram:

[

\text{Total units per hour} = \text{Weight in kg} \times \text{units per kg/hour}

]

[

\text{Total units per hour} = 100 \text{ kg} \times 20 \text{ units/kg/hour} = 2000 \text{ units/hour}

]

Therefore, the correct answer is that the patient should receive 2,