The study on the evaluation of renal function reducibility of hydronephrotic renal using color doppler ultrasonography

Objective To explore the value of color doppler ultrasonography in evaluating renal function reducibility in patients with severe hydronephrosis.Methods Sixty-two patients including 70 renals were involved in this study.Intrinsic artery of kidney resistant index and thickness of renal parenchyma were measured before operation and 2～3 months later using color doppler ultrasonography respectively.These patients were divided into two groups:nonvisualization(15 kidneys) and visualization(55 kidneys)group,according to results of urography in 2 hours after operation.The relationship between these ultrasound markers and renal function reducibilitywas analyzed.Results RI in visualization and nonvisualization group were 0.73±0.06、0.82±0.01,respectively.Thickness of renal parenchyma in two groups were 0.45±0.08cm、0.23±0.09cm respectively.There were significant differences between two groups.Regarding thickness of renal parenchyma being 3mm as criteria of reducibility,Accuracy,sensitivity and specificity were 84.5% 92%;80.9%.When RI was 0.81,accuracy、sensitivity and specificity were 81.4% 67%;87.6% in judging reducibility.Conclusion RI and thickness of renal parenchyma could reflect the degree of renal function damage,furthermore,predict renal function reducibility in patients with serious hydronephrosis.