The small intestine is divided approximately 45 cm (18 in) below the lower stomach outlet and is re-arranged into a Y-configuration, enabling outflow of food from the small upper stomach pouch via a "Roux limb". In the proximal version, the Y-intersection is formed near the upper (proximal) end of the small intestine. The Roux limb is constructed using 80–150 cm (31–59 in) of the small intestine, preserving the rest (and the majority) of it for absorbing nutrients.Medical history: 40-year-old woman, septic shock after subcutaneous infection after gastric bypass surgery 1 week ago. Multi-organ failure. BMI: 59.8kg/m2Comment: The Roux-en-Y (R / Y) gastric bypass is a surgical technique that, by food restriction and shortening of intestinal transit (malabsorptive side effects), is used to treat extremely obese persons and leads to weight loss. This intervention of obesity surgery is the last resort when conservative therapy has failed.