Heparin and PICCs

This may still pertain to the previous heparin question, but a different situation.
There's a policy at my hospital for flushing PICC lines as well. We had a situation where a patient had surgery and needed pain medication every hour. While getting report from the preivous nurse she states she was flushing with normal saline, but not the heparin. I would like to hear the solution to this please.
We are switching over to the new end ports where we do not have to flush with heparin. Thanks for all who did reply.