Assessment of the Overstich Technique for the Management of Weight Regain After Gastric Bypass.

Inclusion Criteria: * Age \> 18 years * Surgical criteria: patient with bariatric surgery by gastric bypass since, at least, 24 months * Clinics criteria of weight regain or treatment failure: * Patient with weight regain\> 5kg / m² * Patient with EWL (excess weight loss) \<25% after 2 years of treatment. * Loss of early satiety (interrogation) * Patient with a compatible psychological and cognitive status with the study, * Patient agreeing to follow the procedures of the study and can participate at the follow-up study during 2 years * Subject with no rights from the national health insurance programme * Consent form signed Exclusion criteria: * Pregnancy (plasma assay of beta-HCG positive) * Presence of cardiovascular, neurological, psychiatric, endocrine, renal, gastrointestinal or tumor comorbidities making irrelevant patient participation in the judgment of the investigator * Patient participating in another clinical study or participated in another study within the last 30 days or for which the annual compensation received exceeds € 4,500 * Patient with a contre-indication to the achievement of surgery (fistula, ulceration, ...)