Methods and devices for treating obesity by combining known bariatric surgeries with a method for disrupting the vagal nerve. The method for disrupting the vagal nerve comprises use of a high energy delivery device which is positioned within the esophagus to deliver transesophageal energy to interrupt the function of one or both branches of the vagal nerves. Combination of this method with known methods, such as gastric bypass and gastric banding, may increase weight loss by the patient in comparison to a single treatment on its own. In addition, methods and devices for disposing a restrictive structure such as a mesh around a selected segment of the gastrointestinal tract prevents enlargement of the segment.