[Veno-arterial index of the liver]

Calculating according to the formulas (Formula: see text), where D is the vascular diameter and H--the blood pressure in it, the venoarterial index in the fetus liver is obtained. The difficulty for the determination of the index is connected with the fact that there are several afferent and efferent vessels in which blood is flowing under various pressure. The venoarterial index characterizes the hemodynamic conditions in the organs. Studies on the venoarterial index in most organs of fetuses, children, mature persons and old people, in particular, to define more accurately the dynamics of certain pathological disorders should be performed comparing it with blood pressure, resistance and blood flow volume results.