Renal hemodynamics in patients with acute obstructive uropathy evaluated by duplex Doppler study

Abstract

Objective: To detect the sensitivity of Doppler study of renal arterial resistivity index in patients with acute obstructive uropathy presented by hydronephrosis and hydroureter by taking CT-KUB study. 
Methods: this is a comparative cross-sectional prospective analysis done between January 2020 and march 2021. The data were collected in Rizgary teaching hospital. The study included patients with flank pain referred to Radiology department and those with hydronephrosis included  in  the  study.  Same  number  of  normal  participants  were examined by ultrasound for comparison. The ultrasound examination undertook between 2-6 hours after the onset of loin pain.  
Results: the data was collected from 51 patients, age ranging from 18- 57 years, and equal number of participants of relatively the same age was collected, males constitute about 78.4% of total number of 51 patients, females constitute of about 19.6%. 
Hydronephrosis has been found in all patients with loin pain; divided into  three  categories;  mild  (72.5%),  moderate  (27.5%),  no  sever hydronephrosis was recorded in the study. 
The stone was confirmed by ultrasound in 20 patients constituted about 39.2%, the stone in 31 patients was confirmed by CT-KUB which constituted 60.8%. 
Resistive index of affected kidney was 0.689, in contrast the resistive index of the contralateral normal kidney was 0.613. 
Conclusion: Doppler ultrasound with measurement of RI is effective in the evaluation of distal ureteric obstruction, but it cannot replace the CT-KUB. Hence, this study concludes that the renal resistivity indices should not be interpreted in isolation.