Final answer:
To calculate the ml/hr that you should set the infusion pump, determine the total amount of heparin in the 500 ml solution and then calculate the total number of ml/hr by multiplying the desired units/hr by the amount of solution in each unit. The rate at which the infusion pump should be set is 20 ml/hr.
Step-by-step explanation:
To calculate the ml/hr that you should set the infusion pump, you need to first determine the total amount of heparin in the 500 ml solution. Since the solution is 25,000 units in 500 ml, that means there are 50 units of heparin in each 1 ml of solution.
Next, you need to calculate the total number of ml/hr by multiplying the desired units/hr (1000 units) by the amount of solution in each unit (1 ml/50 units). This gives you a result of 20 ml/hr, which is the rate at which the infusion pump should be set.