Evidence for the effectiveness of surgical treatment of morbid obesity on life span, quality of life and associated diseases proves it an applicable alternative for the morbidly obese in cases where other means of controlling obesity have remained ineffective. The operation causes significant weight reduction even within a 15-year follow-up. Surgical mortality after an endoscopic operation is usually less than 0.5%. After the operation, patients fairly often experience various symptoms of the digestive tract. Common complications include various infections and functional disturbances associated with the band.