Curious about pre-surgical diets

I know that every program in Alberta is different. I am curious for those of you who have had surgery, what diet were you put on before your surgery date, and for how long. Also what weight were you before you started the diet and time of surgery?
I am just really curious how the different diets worked for people of different weights.

I know that at the weight wise, dr. karmali wants his bigger individuals to do three weeks of liquid pre surgery date.. to shrink the liver.  Tammy

 what is the diet that you have to do in the weight wise program?

I ust had the sleeve last Monday the 18, with Dr Davey.... I had no pre op diet he said he doesn't make his patients do one, but I never saw him through the weight wise clinic.  My starting weight was 345 and day of surgery no loss, I really tried hard the first 3 months I was seeing him and lost 15lbs but when he said he was scheduling my op I gave up enjoyed what I wanted and gained the 15 lbs.... Mind you I did have a weight loss of 65lbs the prior year doing the Hcg diet, so I can diet but I had enough.  My metabolism is so slow that I have to eat what I'm going to be eating now and exercise 5hrs a day... figured that's what my sleeve is for.