Fig. 1

Three-dimensional computed tomography images and schemas of the renal blood vessels. Three renal arteries branched from the aorta, and the superior and middle arteries (1, 2) branched into two arteries (1-1, 1-2, 2-1, 2-2) (a). The renal arteries were cut at the dotted line (b). The superior artery was cut distal to the branch point due to bleeding. Four renal veins branched from the vena cava (c). The two veins at the middle (2, 3) were cut simultaneously with the vena cava wall (d)