Noor,
I have been thinking about having Lap Band for the last two years or so, but I didn't start researching it until earlier this year. I started researching it in April or May, and made the definite decision in June. I chose Dr. Webber as my surgeon for several reasons. The first was cost. As you know, Great Lakes Weight Loss is one of the more inexpensive places to get gastric band surgery in the country. However, I did a lot of research on the Great Lakes surgeons and came to the conclusion that Webber was the best. I have heard great things about him and am very comfortable with my decision. I also chose them because they are relatively (I use the term loosely) close to me at a six hour drive or less than an hour flight away. I think this is important in case there are complications.
As far as how I learned about the nutritional aspect, once you schedule a surgery date a coordinator with GLWL will give you a very large packet of information that covers your diet in great detail. Also, it is my understand that after my surgery I will meet with the Nutritionist at the hospital to go over my diet. And to answer your question, the reason they require a pre-op diet is to shrink the liver to make the surgery easier. If you YouTube a gastric band surgery you will see why it is so important to make the liver as small as possible. The reason for the post-op diet is to allow your stomach to heal. They put in sutures that basically tie your stomach around the band, if you stretch out your stomach while they are still healing you could run into complications.
I did not know that they would not perform the surgery if your BMI was over 45, I am assuming that this is either a new rule or that they make exceptions, because my packet has specific instructions for people with BMI's greater than 50.
The best advice I can give you is to snoop around this website. There is a question and answer section that I found really informative. Thank you, I am very excited about the surgery and I will make sure I let you know how it goes.