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A significant increase in microvascular RBC aggregation results in local hemorheological disorders, which is, in all probability, related to derangement of the blood-flow structuring in microvessels.

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Бурный технический прогресс и рост вооружен ности современного общества, урбанизация, техно генные катастрофы, природные катаклизмы, войны способствуют увеличению числа пациентов с геморThe stormy growth of technical progress and arma ment of modern society, urbanization of cities, technogenic catastrophes, natural cataclysms, local and territorial wars contribute to increase the amount of patients with a hem Blood loss is a complex pathological process with the mechanism that has not been fully unstudied. Blood rheology is a particular link that is involved in blood losses. Objective: to perform a comprehensive study of blood rheological proper ties, such as erythrocyte aggregability, erythrocyte deformability, plasma viscosity, and packed cell volume, in different degrees of experimental blood loss. Materials and methods. Blood loss of different stages was simulated in anesthetized animals. The Georgian technique, membrane filtration, a capillary method, and a standard centrifugation method were used to study blood rheological properties. The data were analyzed applying the statistical programs Origin 4.1 (Microcat.Software.Inc) and Microsoft Excel. Results. In stages 1, 2, and 3 blood losses, erythrocyte aggregability was significantly increased by 10, 25, and 44% and erythrocyte deformability was decreased by 12, 13, and 15%, respectively, as compared to the controls. The delta viscosity was insignificant (both in the subgroups in different blood loss degrees versus the control group); the packed cell volume in blood loss was increased insignificantly as compared to the control. Conclusion. Comprehensive assessment of the degree of blood loss requires a minimum set of blood rheological indices, such as erythrocyte aggregability and deformability, blood viscosity, and packed cell volume. The basis for monitoring the rheological indices of massive blood loss is the specific features of erythrocyte aggregation.

BACKGROUND: Prevention of Type 2 diabetes mellitus (T2DM) requires a modifying effect on the pathological processes inducing the β-cell dysfunction. OBJECTIVES: the comprehensive study of the violation of rheological parameters in patients with different stages of diabetes and identification of possible links between these alterations with the intensity of the oxidative stress in the patient’s body. METHODS: 60 patients with IR, prediabetes, T2DM and healthy volunteers were included. Full range of the rheological parameters of the patients’ blood - the indicators of erythrocytes aggregation index (EAI), the relative deformability of the erythrocytes membranes (ERDI), blood plasma viscosity (BPV), and oxidative stress intensity (OSI) were examined. RESULTS: In patients with insulin resistance (IR), prediabetes, and T2DM the ERDI was statistically significantly lower and BPV - higher compared to control; a significant increase in EAI was detected in the patient group with prediabetes and T2DM compared to the control. CONCLUSION: The level of rheological disorders in patients increases with the increase of the level of carbohydrate metabolism disorders and intensity of oxidative stress and reaches a maximum during manifested diabetes. Diagnosis of hemorheological disorders and OSI in T2DM can serve as an early marker of target organ damage possibility.