All I was asked for was a blood test, urinalysis, upper G.I and, EKG. As for a pre-op diet, I only had to be on liquids for a few days before surgery. My insurance approved it within a week.
I was revising from band to sleeve though, so perhaps it was different for me.
I was lucky that I'd just been banded the previous holiday season. This season, however, ooh boy. I'm really rather disappointed with how easily I excused my poor choices with "it's the holidaaaays~!" The weight gain on the scale still makes me cringe, though thankfully I'm losing again.
I'm certainly glad to be back on track though.
My daily intake is 800-900 calories. MFP always scolds me for not eating enough and putting my body into starvation mode but I can't fathom eating any more than I already am.
I've been told that taking Biotin should help - unfortunately, it actually seemed to make me gain weight the days that I used it, eeek. I suppose I'll probably give it another go just to make sure it wasn't just a normal day-to-day weight fluctuation.
My doctor and his nurse practitioner both recommended the band over the sleeve for me because I was 21 - it's interesting how surgeons have such differing opinions on these sorts of things.
I wish you all the best on your journey!