<unk>  is a bariatric surgery performed on patients with morbid obesity to create an irreversible weight loss, when implementing harsh restrictions on the diets have failed. Jejunocolic anastomosis was firstly employed. Nonetheless, it led to some unexpected complications such as severe electrolyte imbalance and liver failure. It was then modified to jejunoileal techniques. Viewed as a novel form of treatment for obesity, many<unk>  operations were carried out in the 1960s and 1980s. Significant weight loss was observed in patients, but this surgery also resulted in several complications, for instance, nutritional deficiencies and metabolic problems. Due to the presence of surgical alternatives and anti-obesity medications,<unk>  is now rarely used.
Intestinal bypass
Jejunoileal bypass
Ileojejunal bypass
Longitudinal intestinal lengthening and tailoring
Ileal interposition
Partial ileal bypass surgery
Duodenal-jejunal bypass liner
Jejunojejunostomy