This surgery is very popular and effective for the treatment of morbid obesity, it is a mixed type procedure: restrictive and malabsorptive. The procedure consists in diminishing and restricting the absorption of food by creating a small reservoir at the expense of the smaller curvature of the stomach plus a deviation to the small intestine in Roux-en-Y, thus obtaining an early satiety for the restrictive component plus malabsorption that adds efficiency to the technique.