The purpose. To establish the changes in the functional state of kidneys, depending on the stage of chronic renal disease in comorbidity with non-alcoholic steatohepatitis against a background of obesity.Material and methods. 240 patients with chronic kidney disease (chronic bilateral pyelonephritis) of the I-III stage were studied: 145 patients had comorbid non-alcoholic steatohepatitis (NASH) and obesity (1 group), 95 patients were diagnosed with CKD I-III stages without comorbid pathology . Depending on the stage of the CKD, the groups of patients were divided as follows: group 1 was divided into 3 subgroups: CKD stage I - 51 patients, CKD stage II - 53 patients, CKD stage III - 41 patients. The 2nd group was divided into 3 subgroups: CKD of the Ist stage - 32 patients, CKD of the IInd stage - 35 patients, CKD of the IIIrd stage - 28 patients. The control group consisted of 30 practically healthy persons (PHPs).Results. The analysis of indices of the kidneys’ functional state showed that creatinine content in the blood of group I patients exceeded the data in the PHPs in 1,5 times (p <0,05), in group II - 1,3 times (p <0,05) . In patients with CKD, stage III, blood creatinine in group I exceeded the data in PHPs by 2.3 times (p <0.05), in group 2 - by 1.9 times (p <0.05) respectively. So, comorbidity with NASH significantly affects the kidneys functional state indicators, in particular, their nitrogen-excretory function. Thus, the content of blood urea in patients with CKD I stage exceeded the indicators in PHPs, respectively, in groups I, II - in 2,4 and 2,2 times (p <0,05). In patients with CKD II stage in group 1 the urea content exceeded the index in PHPs by 2.5 times compared with 2.4 times in group 2 (p <0.05). As a result of the established changes, a significant decrease in GFR (Glomerular filtration rate) was obtained for creatinine clearance using the Cockroft-Gaulta formula. Thus, the indicator of creatinine clearance by the Cockroft-Gaulta formula in patients with CKD I stage was lower than that in PHPs only in group 1 patients (11.8%) (p <0.05); in patients of group 2, changes were unlikely and no significant difference was found between the groups (p> 0.05). In patients with CKD II stage in group 1, the creatinine clearance score was lower than the PHPs index by 39.2% versus a decrease of 25.5% in group 2 (p <0.05) with a confirmation of statistically significant difference between the groups (p <0.05). At the same time, patients with CKH III stage, the rate of creatinine clearance in patients in group 1 was lower than the normative at 55.9% (p <0.05), in group 2 - by 44.1% (p <0.05), with the presence of a probable difference between patients with a combined course NASH and CKD in comparison with patients with CKD without comorbid diseases (p <0,05). Conclusions. Non-alcoholic steatohepatitis significantly aggravates the course of chronic kidney disease of І-ІІІ stages with a possible decrease in nitrogen excretory function, glomerular filtration rate, hypopaluminemia than in the isolated course of chronic kidney disease.
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