A patient is ordered a heparin infusion. Prepare heparin to a concentration of 50units for every ml to be added to 500ml of 0.09% N/S. She is ordered 35mls every hour for the first 4 hours. Following the results of her APPT, her heparin medication order is altered to 42mls per hour for the next 4 hours. In stock heparin is 5000units/1ml.
a). How many mls of heparin would you add to the N/Saline?
b). How many units of heparin would she be administered every hour in the first 4 hours?