Analysis of Arterial Basins and Venous Drainage Zones in Kidneys with a Two-zone Blood Supply System

To review zonal features of the blood supply to the kidneys and to identify the venous basins, depending on the options for the structure of the arterial and venous bed of the kidney. The study was carried out on 124 polychrome corrosive preparations of the arterial and venous systems of the human kidney. For digitization, the preparations were subjected to 3D scanning. The authors identified the zones of local blood supply to the areas of the renal parenchyma and venous drainage depending on the variants of the division of the renal artery and the fusion of the renal vein in a 3D projection in a computer program. It has been established that the features of the local regional blood supply to the kidney zones and venous outflow from its parenchyma have a dependence associated with the variants of the division of the main renal artery in the renal hilum on the 2nd order arteries, that is, zonal arteries, A. zonal (II), which have their own quantitative and topographic characteristics in the hilum of the kidney, and later in the parenchyma of the organ, where they form the corresponding vascular basins. The structure of the vascular basins will depend on the loose or magistral types of intra-organ branching of the zonal arteries, A. zonal (II) into the arteries of the 3rd, 4th, etc. order. The system of venous outflow from the kidney has a similar structure, except for the absence of zones or regions of isolated venous outflow from the kidney.