How much of the stomach is typically removed during a sleeve gastrectomy?

During a sleeve gastrectomy, approximately 80% of the stomach is typically removed. This surgical procedure involves the resection of a substantial portion of the stomach, transforming it into a sleeve-like structure. The significant reduction in stomach size helps to limit food intake and induces hormonal changes that can positively affect weight loss.

The alteration of stomach capacity also plays a crucial role in the management of obesity; the remaining stomach, resembling a tube or sleeve, limits the amount of food that can be consumed at one time. Furthermore, the procedure results in a decrease in the production of ghrelin, a hormone associated with hunger, thereby contributing to reduced appetite and facilitating long-term weight management.