• patients aged 18 to 75 years;

* obese with BMI ≥ 35 kg/m2 , despite at least six months of appropriate medical, nutritional, dietetic and psychotherapeutic management;

* having received accurate information about the surgery and requesting the procedure;

* considered eligible for bariatric surgery following discussion at the multi-disciplinary meeting;

* having understood and accepted the need for long-term medical and surgical follow-up;

* with a GFR estimated by MDRD \< 60 ml/min/1,73 m2 ;

* women of child-bearing age must be using an effective method of contraception;

* valid status in the social security system;

* having signed the informed consent document, included the care contract.

Bariatric Surgery for Obese Patients With Chronic Renal Insufficiency