Abstract

Objective: To determine the diagnostic accuracy of renal arterial resistive index on Doppler ultrasound in patients with acute renal colic to diagnose obstructive uropathy taking contrast enhanced helical computed tomography as the gold standard.
Study design and setting: The cross-sectional study is conducted at Department of Radiology of Bolan Medical Complex Hospital, Quetta, from June 10, 2019, to February 09, 2020.
Methodology: 320 patients with complaint of renal colic were evaluated with ultrasound and subsequently contrast enhanced computed tomography scan of kidney, ureter and bladder was performed. Data was collected on prescribed proforma and analyzed using SPSS 20.
Result: The sensitivity of the index was 76.23%, specificity was 88.13%. The positive predictive value was 91.6%, and negative predictive value was calculated to be 68.42%. The diagnostic accuracy of the test was 80%.
Conclusion: Renal Doppler ultrasound can determine altered renal perfusion before pelvicalyceal system dilatation and can distinguish obstructed and non-obstructed kidneys

Keywords: Intrarenal; Resistive index; Color doppler sonography; Obstructive uropathy; Non-obstructive uropathy; Contrast enhanced CT scan