Final answer:
By calculating the concentration of heparin as 0.4 units/mL, we can determine that 40 units of heparin will be delivered per hour when the IV is set to run at 100mL/hr.
Step-by-step explanation:
The question asks how many units of heparin will be delivered per hour if the physician orders heparin sodium 200 units /500 mL to be run at 100mL/hr. We can start by determining the concentration of heparin in units per milliliter:
Total units of heparin: 200 units
Total volume of solution: 500 mL
Concentration of heparin: 200 units / 500 mL = 0.4 units/mL
Next, we can find out how many units of heparin are in 100 mL:
100 mL x 0.4 units/mL = 40 units of heparin per hour.