Duodenal Switch is a surgical technique for weight reduction and comorbid diseases control; It is the most laborious of all bariatric procedures so far, it involves performing a Vertical Sleeve Gastrectomy and a Y-Roux Bypass to the duodenum. With this technique, a 70% to 100% of excess weight is lost in a long term, improving all comorbidities and reaching a 95% to 97.9% metabolic regulation of dyslipidemia and diabetes. Notorious changes can be seen since the first week of a Bariatric Surgery of Duodenal Switch. This surgery, which must also be done through minimal invasion, requires five to seven incisions, so six are usually done.