Gastric sleeve surgery is a type of bariatric surgery. Gastric sleeve surgery (Sleeve Gastrectomy) is usually performed with the laparoscopic method or as a closed surgery, as commonly known by the people. By reducing the stomach volume, effective and permanent weight loss is aimed, so patients feel full faster with small portions. Since about 80% of the stomach is taken and turned into a banana form, the desire for food decreases and the brain feels less hungry. In this way, it helps the patient to fall to the ideal weight after the surgery or to stay at the ideal weight..