Inclusion Criteria:  Patients older than 18 and younger than 65 who fulfil bariatric surgery indications BMI between 50 and 60 kg / m2 Patients with a good overall condition to perform a one step surgery Signing up of the informed consent for the study Patient suitable for laparoscopic surgery  Exclusion Criteria:  Previous bariatric surgery Two stage surgery Medical contraindication for a hypoabsorptive surgery due to previous pathology: inflammatory bowel disease, organ transplantation or candidate for a transplant, previous intestinal resection surgery Conversion to laparotomy