In the United States, the most popular type of intestinal bypass performed was the so called "14 plus 4" with an end to side jejunoileostomy, a 14 inches biliopancreatic limb with a 4 inches common channel. Because of poor weight loss, some surgeons used to performed an end to end jejunoileostomy avoiding chyme to reflux into the defunctionalized limb; Through an ileocolostomy, the defunctionalized jejunoileal limb was drained into the cecum or sigmoid colon.