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Obesity is probably the most common metabolic disorder in the western world. Today there are 1100 million people suffering from obesity or overweight in the world.

There are different types of non-surgical treatments like diet, medicines and physical exercise have been proved to reduce the pathologic body weight with unsuccessful long term results. Weight loss surgery = Bariatric surgery is the only scientifically recognized treatment with proven efficacy for permanent weight-loss in a high rate of patients.

The Gastric by-pass (GBP) has been the most common operation performed in bariatric surgery in the last 25 years and its results are the standard reference for the new operations to be compared with.

In the GBP the volume of the stomach is reduced cutting its upper part and creating a small pouch which will be the “neo-stomach”. Next, the small bowel is cut approximately 120-150 cmt counting from the duodenum and the distal loop is sutured to the gastric pouch. The proximal loop biliary drainage and pancreatic secretions are then sutured allowing food to be digested properly.

When this technique is performed, the patient will feel early satiety with low amount of food (restrictive component) and the food intake will have reduced absorption because the duodenum has been by-passed, altering the normal route of the aliments in the digestive tract.

Gastric “by-pass” is recommended for patients with a BMI>50 who have bad chronic alimentary habits as snacking frequently or being sweet-toothed, especially if a type 2 Diabetes Mellitus is associated to the obesity.

Updated: 2014-03-27

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