A surgical procedure designed to help obese patients lose weight. It is a modification of the original loop gastric bypass designed to limit oral intake and create a “physiological dumping” effect to discourage patients from consuming high-sugar foods. Iron absorption and iron status are reduced in these patients as is vitamin A and D absorption. The loss of intrinsic factor needed for vitamin B12 absorption also means that B12 status is compromised unless injections of this vitamin are provided. Bone density decreases as mineral absorption is impaired.
A bariatric surgical procedure in which the superior portion of the stomach is isolated from the rest of the stomach and the jejunum is connected to it. As a result, food passes directly from the proximal stomach into the middle of the small intestine. It bypasses the majority of the stomach, which is isolated from the working portion of the stomach and from the duodenum. An opening is made in the duodenum and the jejunum, and the two organs are connected via a surgical stoma. This permits drainage into the jejunum of gastric secretions from the isolated greater curvature of the stomach. This form of gastric bypass is the most common bariatric surgical procedure and among the most successful. Since the duodenum absorbs many important vitamins and nutrients, including iron, vitamin Bj2, and calcium, nutritional deficiencies and iron-deficiency anemia are common complications. Others include nausea, vomiting, ulcers, and anastomotic leaks.
A surgical procedure for weight loss, called bariatric surgery, involves the combination of restrictive and malabsorptive techniques. Restrictive methods entail stapling or banding the stomach to create a small pouch, while malabsorptive techniques involve attaching a Y-shaped portion of the small intestine to the pouch. This technique bypasses both the duodenum and a fraction of the jejunum.