Evaluation of Possible Postoperative Complications After Nissen Sleeve Gastrectomy. French Multicenter Study

Inclusion Criteria: * Signed informed consent form * Subjects must be able to attend all scheduled visits and to comply with all trial procedures * Subjects must be covered by public health insurance * Contraception efficacy * Subjects eligible for sleeve gastrectomy after multidisciplinary evaluation according to HAS 2009 criteria: BMI ≥ 40 kg / m² with failure of the dietary treatment for at least 1 year, or a BMI ≥ 35kg / m² with at least one co-morbidity that could be improved after surgery (hypertension, obstructive sleep apnea hypopnea syndrome (OSAHS) and other severe respiratory disorders, severe metabolic disorders (especially type 2 diabetes), debilitating musculoskeletal diseases, non-alcoholic steato-hepatitis (NASH)) Exclusion Criteria: * Subject unable to read or/and write * Planned longer stay outside the region that prevents compliance with the visit plan * Current pregnancy * Previous bariatric surgery (ring, vertical banded gastroplasty, sleeve gastrectomy or Gastric Bypass). * Previous reflux surgery * BMI \> 50 kg / m² for women and \> 45kg / m² for men (dissecting the hiatus region can be a technical challenge in these cases). * Barrett oesophagus and esophagitis stage III and IV. * Funditis * No affiliation at the French social security scheme. * Major protected by law. * Deprivation of liberty by judicial or administrative decision. Participation to another clinical research program.