Contribution to the study of the arterial and venous vessels at the renal hilus in wool-less sheeps

Abstract

The study of arterial and venous vascularization of renal hilum in 30 pairs of kidneys of wool-less ovines, being 15 males and 15 females, was carried out. After fixation and dissection of kidneys, the number and disposition of renal vessels at the hilum were analyzed. In the right kidney, the numbers of arterial branches we-e six (25.7»), eight (23.3%), five (15.7»), nine (13.3%), seven (13.3%), ten (3.3%), four (3.3%), and in the left kidney were eight (43.3%), six (15.7%), ' ten (13.3%), seven (13.3%), nine (6.7%) and five (6.7%). In the right kidney, the numbers of venous roots were three (33.3%), four (26.7%), five (20.0%), two (13.3%), seven (3.3%) and in the left kidney were three (43.3%), four (30.0%), five (10.0%), two (10.0%) and six (6.7%). In both kidneys, the cranioventraI quadrant was the richest in arterial branches, followed by craniodorsaI, caudodorsal and caudoventral quadrants. In relation to the venous roots, in the right kidney, they were more numerous in the cranioventraI quadrant, followed by craniodorsal, caudoventral and caudodorsal quadrants, while in the left kidney they were more concentrated in the caudoventral quadrant, followed by cranioventraI and caudodorsal quadrants. It was observed the same number of arterial branches in both kidneys of 11 animals (36.7%), the same number of venous roots in 8 animals (26.7%) and the same number of arterial branches and venous roots in 4 animals (13.3%). In the right kidney, the arterial branches presented a exclusively peripheral disposition in 17 out of 30 animals (5S.7%), mainly peripheral in 12 animals (40.0%), and mainly central in one animal (3.3%), while in the left kidney had an exclusively peripheral position in 18 animals (60.0%), mainly peripheral in 11 animals (36.7%) and an even peripheral and central in one animal (3.3%). The venous roots of both kidneys presented exclusively peripheral position in 28 animals (93.3%)' and mainly peripheral in 2 animals (6.7%).