This depends on the type of bariatric surgery you are having. If you are having a Roux-en-Y gastric bypass, surgery will typically take 2 1/2 to three hours. If you are having a sleeve gastrectomy, you can expect surgery to take 1 1/2 to two hours. Each case is individual, and these times are only rough estimates.

The anesthesiologist will meet with you before surgery to talk about your anesthesia. All patients having bariatric surgery will have general anesthesia. This means that you will be completely asleep during your surgery. 

Most patients will spend two nights in the hospital. For example, if you have surgery on a Monday, you can expect to go home after lunch on Wednesday.

The average patient loses about two- thirds of their excess bodyweight in the first 12 to 18 months after surgery. Your excess body weight is the difference between what you weigh now and what your ideal body weight is. 

In the year following surgery, you will tend to lose weight no matter how you eat or how active you are. To keep the weight off, you will need to eat a healthy diet and get plenty of exercise.