How do you know if they are using a pump or not? Sometimes when Selah gets ivig they use the hanging iv bag and sometimes it comes up with the tube thing and they put it in the arm thing that pushes it left to right. I might be wrong, but it seems like the flush afterwards seems longer with the bag as they have to flush all the medication that is in the line and the line is longer with the bag. One time with the bag, the nurse punch the hole wrong and it went all over the flloor. That was a long day.