MATHEMATICAL-MODELING OF BLOOD AGGREGATIO N IN PATIENTS OPERATED ON IN CONDITIONS OF EXTRACORPOREAL-CIRCULATION

Low blood viscosity was not related to homeostasis in patients undergo ing surgery under extracorporeal circulation. Blood viscosity early af ter surgery was similar both in hypo-and hypercoagulation. Therefore, assessment of blood viscosity in such patients by santipuases provokes diagnostic mistakes. Real situation with blood aggregation can be pro vided by mathematical model of non-Newton's blood properties based on viscosity-deviation rate relationships. The results showed a decrease of blood fluidity suggesting feasibility of microcirculatory disturban ces even in surgical patients with normal central hemodynamics and hem ocoagulation. According to non-Newton's blood properties, the nation ' 'norm'' is not applicable to blood viscosity, while the above mathemat ical model allows comparing blood aggregation in any patients without artificial standardization of hemorheological data.