The Sleeve Gastrectomy is also referred to as gastric sleeve, tube gastrectomy or vertical sleeve and is a minimally invasive procedure that combines a restrictive and metabolic type of weight loss surgery. The size of the stomach is reduced by up to 80% using a surgical technique to decrease its storage capacity. By removing up to 80% of the stomach, this will produce chemical changes in the body that decreases your appetite. The procedure includes removing the portion of the stomach that produces specific hormones such as leptin and ghrelin which control energy and appetite balance.