diet before Nissen Fundiplication Surgery

I'm scheduled to have Nissen Fundiplication Surgery on 1 November 2012. My doctor put me on a 7-day pre-op diet. Has anyone else been on this diet. It consists of 60 proteins a day - no sugar and nothing to eat. The doctor says he wants to shrink my liver before surgery to make the surgery easier.

No - and I am only about 25 pounds heavier than I would like to be. I think my doctor does this routinely for everyone. Was just curious if other doctors are doing it.