The Sensitivity of Renal Color Doppler Sonography In Differentiating Obstructive and Nonobstructive Urinary Calculi In Patients With Acute Renal Colic Prospective Study

Abstract

objective: The purpose of this study was to determine the sensitivity of renal color Doppler sonography in differentiating obstructive and nonobstructive urinary calculi in patients with acute renal colic and to compare findings with nonenhanced helical computed tomography (CT)PATIENTS AND METHODS Between January 2009 and May 2012. Eighty five patients referred to the emergency department of Hilla teaching hospital with acute renal colic underwent nonenhanced CT and renal resistive index (RI) measurement with color pulsed Doppler sonography within 8 to 10 hours of the onset of the symptoms. Computed tomographic evaluation was based on the detection of urolithiasis and the presence of obstruction. The mean RI of each kidney and the difference between the mean RI of both kidneys were calculated and compared with CT findings.RESULTS: Tomography revealed obstruction in 43 patients and nonobstucted in 42 patients . Mean RI values for the obstructive and nonobstructive groups were 0.64 and 0.63, respectively. The differences in the mean RI for the patients with and without obstruction were statistically insignificant (P = .73). No significant relationship was found between the RI values, calculus location, and degree of obstruction.. CONCLUSION: No significant relationship was found between the RI and obstruction, obstruction degree, or location. The use of this modality will be time-consuming and ineffective in routine practice.The RI is not sensitive for detection of obstruction in patients with acute renal colic