I had to do an 8-day pre-op liquid diet (also to shrink the liver and quickly shed some weight, both of which make surgery easier). Mine was 6 servings (each mixed w/ 8 oz. of skim or 1% milk) of no-sugar-added Carnation Instant Breakfast per day, and that was it. No salads, no soups-- just NSA CIB. I was allowed to have a cup of fat-free broth or buillion if I had a craving, but that was the only "cheat" allowed. (Of course, I also had to drink lots and lots of sugar-free/non-carbonated fluids as well, 48+ oz. I believe.)
And in those 8 days, I lost 13 lbs. So yes, it is DEFINITELY possible to lose a significant amount of weight by the time you have your next weigh-in.
The trick with the liquid diet is that you just HAVE TO STICK IT OUT, because believe it or not, it DOES get a lot easier by day 3 or 4... The first two days, for me, were torture-- but by day 3, I wasn't really hungry anymore, and the NSA CIB was more than sufficient to keep me going throughout the day. By the end of it, I had to force myself to get in all 6 servings because my appetite had all but disappeared.
Think about it this way-- a liquid diet is a great way to get yourself into the mindset of what early life is going to look like for you right after surgery-- for the first few weeks, you will ONLY be able to have small amounts of liquids and purees, so you're going to have to get used to that idea one way or another. Lots of people don't experience "hunger" for the first weeks after surgery, but others wake up with just as much "head hunger" after surgery as they ever had before. And if you give in to that "head hunger" after surgery, you could seriously jeopardize your health-- or your LIFE.
My advice is, do a liquid diet for the next 8 days. the NSA CIB plan will give you enough calories/protein/nutrients to keep you healthy (as opposed to diuretics, which are dangerous), and it will be good practice for what will become your new lifestyle. Stop telling yourself things like, "Well if I could do that then I wouldn't be there for the surgery" and "I feel like alot of people who've had the surgery have forgotten what it was like when they had their football-sized stomachs." You can either hold onto the excuses and keep giving yourself permission to fail, or you can buckle down and do what you need to do for the next 8 days. After all, IT'S ONLY 8 DAYS, you know? I know that it's not human nature to adhere to diets for the long-term, but 8 days is nothing. YOU CAN DO IT!!!
