oops, sorry! I posted on the wrong one...

I have not had the band, I am having the RNY.
But, I do know that the surgeon or an associate does do your follow up fills, putting a few cc's of fluid by needle in the ballon part of the band through a bladder under the skin to adjust the size of and time it take the food to leave, the pouch area. If you are at a plateu or have gained or if you are unable to keep more then liquids down...they put in or take out the fluid.
i wish I could help more, but I am very, very sure that someone more knowledgable then I will answer your thread! LOL
Good luck, my friend.
Angela