FIELD: medicine. SUBSTANCE: method involves determining flexibility function as C(p) - dV/dp of vascular system after cardiac ventricle and/or systemic blood circulation of a living being on blood pressure p(t) and reference cardiac minute volume Coref. Aortic blood pressure p(t) or one in the areas adjacent to the aorta is continuously measured, mean arterial blood pressure MAP is calculated from blood pressure p(t). Systemic organism resistance R is calculated as R=(MAP-CVP)/Coref, where CVP is the arbitrary central venous that is set or determined, Coref is the reference cardiac minute volume. At least the first derivative of blood pressure against time p(t)= dp/dt is calculated and flexibility function C(p) is calculated at least on p(t) or p(t) and R, using non-linear model. EFFECT: enhanced accuracy in determining the parameters. 22 cl, 6 dwg
