An endoscope is a long, flexible device that passes through your mouth and esophagus to enter the stomach. To create the gastric sleeve, a suturing (stitching) device is mounted onto the endoscope. Our surgeon will use the OverStitch™ Endoscopic Suturing System, which allows him to place full-thickness sutures. No portion of the stomach will be removed. Instead, he will sew the inside of the stomach, drawing the lateral edges together, effectively reducing its size to roughly that of a banana.