Why didn't I gain or lose weight?

[Bungarian]

I go to the center on Tuesday, Thursday and Saturday. Thursday when I left I weighted 93.9 and I don't remember what I lost that day. Saturday when I weighted going in I still weighted 93.9.  The person setting me up said "you didn't gain any weight". After the 3 1/2 hour session I weighted going out and still weighted 93.9?  Why didn't I gain or lose?

Thanks

[Riki]

do you still pee?  If you do, you could have peed out what you took in, which would keep your weight down.  If you didn't lose any while on dialysis, it's possible that they gave you back what was taken, in order to keep you from dehydrating.