The method applied in Sleeve Gastrectomy (tube stomach) surgery is a closed surgery technique and it is called laparoscopic. In this surgical operation performed by making a very small incision in the body, ports are placed in the incisions and thus the stomach is reached. A surgical telescope with a camera, and tools are placed in order to perform the surgery from multiple incisions. The surgery to be performed is monitored on the monitor with the surgical telescope reaching the stomach. Stomach is stapled and cut in vertical plane with devices with specially developed stapler technology. In this way, approximately 75 -80% of the stomach is removed. Since the remaining stomach will fill up very quickly, the patients get full quickly and experience loss of appetite. In Sleeve Gastrectomy surgeries performed with a closed method, the abdomen is primarily inflated with CO2 gas. Later, the stomach is separated from the spleen, fatty tissues and veins. A tube-shaped stomach remains from the stomach, most of which is removed.