The causes of postprandial hyperinsulinemic hypoglycemia (PHH) in patients who have undergone an upper gastrointestinal tract surgery are still a matter of debate in the scientific community. Low postoperative body mass index, high postprandial beta-cell activity before the surgery, and younger age are all have been associated with higher PHH risk. It is hypothesized that the insulin-like growth factor-1 increases the tissue sensitivity to insulin and indirectly promotes the development of hypoglycemia. An increase in postprandial secretion of enteropancreatic hormones is still considered to be the main reason for PHH manifestation; however, a particular contribution has been ascribed to glycentin, which could be used as a marker of PHH risk in the future.At present, there are no clinical guidelines for the diagnosis of PHH. Undoubtedly, the first step in this direction should be the collection of the disease history. The provocative tests have been proposed for the detection of PHH. Today, the 72-hour fast test is still the gold standard in the diagnosis of hypoglycemia. However, most post-bariatric patients do not have fasting hypoglycemia, and insulinoma is extremely rare in this patient category. The use of a prolonged oral glucose tolerance test as the main method is associated with a risk of a false diagnosis, because about 12% of healthy individuals may have their glycemic levels at below 2.8 mmol/l. The mixed meal test has not been validated yet. The best results in the assessment of glucose variability have been obtained with “real time” continuous glucose monitoring the interstitial fluid for several days.The goal of PHH treatment is to reduce the stimulated insulin secretion. First of all, patients are advised to eat small meals consisting of carbohydrates with a low glycemic index in combination with proteins and lipids, with high fiber content. Should the nutritional modification be ineffective, it is possible to prescribe medical treatment, such as acarbose or somatostatin analogs. Diazoxide and slow calcium channel blockers can be used as the third line of therapy. A recent study has suggested that exogenous agonists of glucagon-like peptide-1 (GLP-1) receptors by stronger bonds with receptors, compared to those with endogenous GLP-1, could enhance glucagon response to hypoglycemia, thereby stabilizing glucose levels. In severe refractory PHH, reconstructive surgery and gastric banding are to be considered. If the expected decrease in insulin hypersecretion by reconstructive surgery is not achieved, partial or complete pancreatectomy remains the only possible approach to prevent hypoglycemia. However, due to the small number and short duration of the studies, effectiveness and safety of these techniques for PHH treatment have not yet been proven.

Nowadays obesity is a major health problem worldwide. Surgery is the most promising treatment for morbid obesity. There are two types of bariatric procedures, one to reduce the food intake volume and the other to limit the absorption of nutrients. Despite the indisputable advantages of bariatric surgery for weight loss, it is necessary to remember the potential risk of severe complications, such as hypoglycemic syndrome at 2 to 3 hours after ingestion of rapidly absorbable carbohydrates manifested by adrenergic and neuroglycopenic symptoms. According to the literature, the prevalence of post-bariatric postprandial hyperinsulinemic hypoglycemia (PHH) varies from 10% to 75%. PHH in post-bariatric patients should be differentiated from the syndrome of non-insulinoma pancreatogenic hypoglycemia and from insulinoma; however, these diseases are described also in patients after bariatric surgery.The mechanisms of PHH as an outcome of shunting bariatric procedures are currently not fully clear. According to the recent studies, incretin hypersecretion in response to the accelerated flow of carbohydrates into the small intestine plays a leading role in the inappropriate excess production of insulin by the pancreas. In addition, there are hypotheses on a slower normalization of insulin production during more rapid bodyweight decrease and regression of insulin resistance, the role of alpha-cell dysfunction, disturbed negative feedback between insulin and ghrelin, compensatory hyperplasia and hypertrophy of the remaining enterocytes (including L-cells), changes in gut microflora, bile acids level and composition. A number of other mechanisms have also been proposed that require further studies.

Aim. To study the effect of weight loss in the short term after bariatric surgery (BO) on metabolic parameters and glomerular filtration rate (GFR) in patients with morbid obesity. Materials and methods. We studied 40 adult (over 18 years) patients with morbid obesity who underwent bariatric surgery. Metabolic indices and calculated GFR according to the CKD-EPI formula in patients before and after bariatric surgery were compared. Results. In the whole group of operated patients, the average body mass index (BMI) after surgery decreased from 45.8 to 30.5 kg/m2. In 11 (92%) patients with impaired carbohydrate metabolism, remission of diabetes mellitus was achieved and sugar-lowering drugs were canceled. In patients with baseline GFR90 ml/min/1.73 m2 after surgery, there is a tendency towards a decrease in GFR, probably due to a decrease in hyperfiltration. In patients with baseline GFR90 ml/min/1.73 m2 after surgery, a statistically significant increase in the level of GFR was noted. The greater metabolic efficacy of combined operations (mini-gastric bypass, biliopancreatic diversion) in relation to the correction of carbohydrate and fat metabolism was revealed. Conclusion. Obesity is a modifiable risk factor for decreased kidney function and the progression of chronic kidney disease. Bariatric surgery is an effective treatment for morbid obesity. The study proved the positive effect of weight loss after BO on renal function, including by improving the course of diseases associated with obesity.

ОРИГИНАЛЬНЫЕ СТАТЬИИсследование сывороточного уровня резистина у пациентов с морбидным ожирением И.Н.Бобкова 1 , С.С.Гуссаова 1 , Е

Background: This study was initiated to find a method of determining the prognosis for possible changes in hemodynamic and respiratory parameters in patients with pneumoperitoneum (PP).