I had lap RNY last Tuesday and was in the hospital two nights (no complications whatever). I hadn't realized that the IV causes you to retain a LOT of fluid, so when they weighed me the first night after surgery, I had gained 12 pounds. They did warn me before I stepped on the scale, but still... My face was really, really puffy from the water retention -- two little sunken holes where my eyes were! LOL!
But once the IV was out (second night after surgery), and I began peeing regularly (a LOT), that weight came off almost instantly.
I am five days out now, and have lost 5 pounds since my pre-surgery weight.
Everyone loses at his or her own rate, as you know. I'd LOVE to be one of those folks whose weight is all lost in 6 months, but I am realistic and know that ain't gonna happen. But one can dream!
'thann