Abstract
Objective: To describe and discuss the most common late postoperative complications in bariatric surgery, based on analysis of two techniques widely used today, which are Vertical Gastrectomy and Roux-en-Y Gastric Bypass Surgery. Bibliographic review: Bariatric surgery is seen as the most effective treatment for severe obesity, determined by a BMI>40kg/m2 or a BMI higher than 35kg/m2 correlated with comorbidities. This intervention has low mortality, but complications are recurrent. Staple line fistula, gastrointestinal bleeding, intestinal obstruction and marginal ulceration are highlighted as the most frequent late events. Among the metabolic and nutritional complications the most evident are Dumping Syndrome, gastroesophageal reflux disease, cholelithiasis and diabetes mellitus. Final considerations: Roux-en-Y Gastric Bypass Surgery is considered the gold standard, although there is no agreement on which intervention should be performed in each case. To choose the procedure, the risks must be analyzed and factors such as degree of obesity and against existing indications must be examined.