Hey there Janice - It really depends on where you go. If you are going to a provider who utilizes floro or not. Where I go, they use floro. It's a major hospital, so for the fill, I go down to radiology. They put me on a table that can stand all the way up. They put the floro machine or the x ray part over my tummy so the surgeon can see my port. Before they do the fill, they check out my esophogus, and stoma to make sure it looks right and is not disended or stretched. I do a barium swallow so they can see my restriction level and also to check me out. ( When they have you do the swallow, the table is up right, so you are nearly standing.) Then they insert a special needle called a huber needle into my stomach. This is a tiny pinch and mostly pressure. They have to make sure the needle is in the port. This feels weird. They put some saline in the band and tip you up to a near standing position to do a barium swallow. You can see the barium going down you into stoma and flow into your stomach. This I am told should take no more than 17 seconds to flow threw. They adjust the level by the way the barium flows threw. It's cool, quick and really painless. It is weird to be upright with the needle still in, but by no means does it hurt.
I will say the needle is a larger one. So if you have a fear of the needle don't watch. The stomach is a great place to get poked, it is not super sensitive. It's a pretty neat process. I like watching every step of the way.
Some places will put a topical on to numb the area. They don't where I go and personally I don't see the need for it. I do not fear needles and it is pretty cool! Hope this helps!