Sleeve gastrectomy is a restrictive bariatric surgery. During this procedure, the surgeon creates a small, sleeve-shaped stomach. It is larger than the stomach pouch created during Roux-en-Y bypass—and is about the size of a banana.
Sleeve gastrectomy patients typically lose an average of 55% of their excess weight. Benefits include improved or resolved co-morbid conditions, little maintenance, normally done laparoscopically, and no malabsorption.