The adjustable gastric band is surgery to help with weight loss and is one of the least invasive treatment for obesity. The surgeon put a band around the upper part of the stomach to create a small pouch to hold food. The band limits the amount of food you can eat by making you feel full after eating small amounts of food.
Sleeve gastrostomy is a surgical weight-loss procedure in which the stomach is reduced by removing a portion of the stomach.
Gastric balloon refers to a surgical procedure which putting an inflated silicon balloon into the stomach temporarily so that there is less space for food.
Gastric bypass is surgery that helps you lose weight by shrinking the size of the stomach into two pouches and then the small intestine is rearranged to connect to both. The food you eat will no longer go into some parts of your stomach and small intestine that absorb food.