Gastric bypass is a surgical intervention for obese patients or for patients with combination of a higher BMI and an obesity-related health problem such as uncontrollable type 2 diabetes. Of the many procedures, the Roux-en-Y gastric bypass is the most common. The surgeon creates a small pouch by dividing the upper end of stomach. A Y-shaped section of the small intestine is attached to the pouch, allowing food to bypass the lower stomach, duodenum and first part of the jejunum.
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Gastric bypass, also known as weight loss surgery or bariatric surgery, is an intervention for people who have more than just a few pounds to lose. Candidates include obese patients or those who are not morbidly obese but have a significant health problem related to their weight, such as heart disease or diabetes.
The most common type of procedure is known as the Roux-en-Y gastric bypass: the surgeon first makes a small pouch out of the upper end of the stomach; a section of small intestine is then connected between the new, small stomach pouch and a point much further along in the digestive tract, bypassing a lot of the small intestine so that much less food is absorbed. As a result, the patient loses weight.