EVALUATION OF OBSTRUCTIVE UROPATHY USING DOPPLER PARAMETERS

Abstract

Obstructive uropathy is a problem that should be solved as early as possible to prevent further deterioration of the kidney function, hence the impmiance of early diagnosis with a reliable, non invasive, easy to do ,and inexpensive tool to distinguish anatomic changes in the upper urinary tract from true obstruction that jeopardize the renal function. In this study, we tried to evaluate obstructive uropathy with Doppler ultrasonography using the resistive index, and the delta resistive index so that the clinical application of this new tool can be tested as compared to other gold standard techniques. Between 2000 and 2004 , 88 patients with suggested obstructive uropathy as well as 38 normal individuals were studied with Doppler ultrasonography. For accuracy a number of exclusion criteria and prerequisite factors have been decided Positive cases for obstruction using Doppler parameters were compared with findings of intravenous urography ,diuretic renography and real time ultrasonography and the sensitivity and specificity of the Doppler test were calculated. •- For more precise evaluation we divided the group positive: for obstruction into mildly ,moderately and severely obstructed and we calculated the sensitivity and specificity in each group.