Inclusion Criteria:  Patients with a BMI between 35 and 40 and comorbidity (type II diabetes, arterial hypertension, sleep apnea syndrome, dyslipidemia, fatty liver disease, arthropathy linked to overweight) related to obesity Patients with a BMI greater than 40 with or without comorbidity Patients affiliated to the social security scheme, with or without mutual health insurance Collection of signed informed consent  Patients with one of the following sets of tools:  Computer tablet and computer with an internet connection Computer tablet and smartphone with an internet connection Smartphone and computer with an internet connection Patients without a history of bariatric surgery Patients with surgical indication for a sleeve gastrectomy  Exclusion Criteria:  Patients who have had obesity surgery Patients who have the indication but want another surgery such as the sleeve Patients who do not have an internet connection and / or an email address Patients with a BMI less than 35 Patients with a major contraindication to surgery and / or American Society of Anesthesiologists (ASA) 4 Patients without social security Patients refusing to sign consent Patients living abroad and / or living more than two hours from the hospital Minors or patients over 70 years old