MANY people have been asking me what a Central Line is, well it can be called many things, a central line, a PA line, and a SWAN line. They all mean the same, and it is really hard to explain, but I will try and do my best. It is a VERY large IV like line that they have stuck through a large vein in his neck that is the size of a pencil, the wires to this line (and there are several) go straight to his heart and they measure the pressures and output of his heart along with various other things, how much oxygen his blood is getting, how much fluid he is retaining, and even his body temp. It is very large and uncomfortable for him as all these wires exit his body through his neck and are hooked up to an extra IV stand on the side of his bed. I hope this kind of explains it, and if not we took pictures this morning so you could have a good visual of what is going on.