I would think it takes as long as your doc puts you on the pre op diet. I'm thinking each person is somewhat different depending on BMIs and how fatty a liver may be. I know if a doc can't get around the liver laproscopically then it's OPEN and no one wants that.
You can do this. I KNOW it's hard, but just think how good you'll feel after surgery. WLS is not an answer. It's just a tool, so you will still have to monitor all you eat. I put SF candies or gum in my mouth when I was unable to eat. I had swanson broth with taco bell sauce. I has SF pudding and dannon diabetic friendly yogurt. When I was on liquids only, no yogurt of pudding, I managedd, but it wasn't easy.
YOU CAN DO IT. HANG IN THERE
I've been on prednisone and chemo for over 7.5 years. Gained over 160 pounds due to pred. Highest wt. 410. Surgery wt. 365. Current wt. 299
See ya,400s, 90s,80s,70s, 60s, 50s, 40s, 30s, 20s, 10s 300s!!!!