13 May 2019 The duodenal switch is a limited gastrectomy , leaving the stomach with a tubular shape by removing its left side (similar to sleeve gastrectomy but with the advantages of this procedure). The pylorus and lower part of the stomach are maintained , unlike in the Scopinaro procedure . The remaining stomach is separated from the duodenum and, as in the Scopinaro procedure, attached to the end of the small intestine, the ileum. The segment that receives biliary and pancreatic secretions (duodenum and jejunum) is connected to the end of the ileum so that it does not come into contact with food. This leads to malabsorption. The disadvantages of this procedure are that it is technically more complex and therefore poses a greater surgical risk of undesirable effects, such as: Diarrhoea Flatulence Foul-smelling stools It can lead to serious nutritional deficiencies (particularly protein) in 3% to 6% of cases. On the other hand, it offers the following advantages : It can be carried out by laparoscopic robotic surgery. It is the most effective of all procedures and most often helps achieve ideal weight. It is more effective in reducing or eliminating comorbidities, especially diabetes (almost always eliminated) and hypertension (eliminated most of the time and almost always improved). It is less dependent on the quantity and quality of the food ingested. It can be performed in two surgical procedures: sleeve gastrectomy and intestinal bypass. It does not require insertion of a foreign body in the abdominal cavity. This article was written with the support of physicians and other clinical professionals from the Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item.