I just moved from one level I trauma center to another in a different state. Of course I expected a lot of things to be done differently, but I think my new hospital may be setting up arterial lines incorrectly. At my old hospital, we would place the NS bag into the pressure bag, invert it, and pressurize it so that all the air was pushed out of the bag AND the chamber. At my new hospital, they seem to simply prime the NS bag just as they would for a regular PIV infusion, meaning they leave air in the chamber and don't get all the air out of the bag. I was told by someone that they do it this way so that they can tell if it's dripping... but you don't NEED to tell if an arterial line is dripping. If it's working correctly, then you'll see it flush the line. Am I wrong about this? It concerns me because in one trauma I was working, the arterial line chamber actually emptied somehow, which put the pt at big risk for an embolus if someone flushed the line. I'm new here and don't want to make waves, but I think a policy change might be needed. What do you guys think?