Type 2 diabetes mellitus with morbid obesity is becoming a global problem with high prevalence and low disease control even with maximal drug therapy. The beneficial effects of bariatric surgery on carbohydrate metabolism have several mechanisms. After operations, the normalization of glycemia occurs both as a result of an improvement in the function of B-cells of the pancreas, and as a result of the incretin effect and an increase in tissue sensitivity to insulin.
We have presented the accumulated experience of the main and most widespread bariatric operations in the world: sleeve gastrectomy, mini-gastric bypass and gastric bypass. The dynamics of changes in glycemia after various operations is shown, their effectiveness in the treatment of type 2 diabetes mellitus is shown and analyzed.