The reason doctors require a pre op diet is in order to shrink the liver.
During the surgery when they place the band, the surgeon needs to lift up your liver and go in under it to get to your stomach.
Many people that are severly overweight also have enlarged livers. With an enlarged fatty liver you there is a much higher chance of the liver bursting during the surgery.
Surgeons have found that a two week low calorie liquid diet reduces the size of the liver by about a third. This makes the procedure much safer to perform.
Like all things with the band, the pre op diet is really there for your own good. Sure it may be hard, but do you really want to wake up in the recovery room and be told the doctor couldn't place the band because you didn't follow your pre op diet??
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