Features of Blood Supply to Four-Segment Kidneys
The study aimed to conduct a 3D quantitative analysis of the arterial bed of four-segment kidneys and to study the characteristics of their blood supply. The authors have investigated 128 corrosive preparations of the arterial system of the human kidney made of fast-hardening polymers. The preparations were subjected to 3D scanning. 3D models were used to study the quantitative characteristics of arterial vessels and segments of the kidney depending on the topography, the number of identified segmental arteries, and arterial basins. It was found that out of 128 investigated corrosive preparations, four-segment kidneys were observed in 10.5% of cases. In those kidneys, one could distinguish the following segments: the superior pole, the inferior pole, the anterior and posterior segments. In four-segmental kidneys, regardless of the type of two-zone blood supply: (the ventral and dorsal zones) or (the superior and inferior polar zones), on average, 1 segmental artery (95.4% of cases), 2 segmental arteries (3.3% of cases), or 1 segmental artery extending from the main renal artery (2.4% of cases) participate in the blood supply of the polar segments. The blood supply to the anterior segment is performed by 1 segmental artery extending from the ventral branch of the RA (96.6%of cases), or by 2 segmental arteries extending from the ventral branch (3.3% of cases). The blood supply to the posterior segment is performed by 1 segmental artery extending from the dorsal branch of the RA (97.5% of cases) or by 2 segmental arteries (2.5% of cases), at p ≤ 0.05.