Diagnostic Accuracy of Ultrasonography in Detecting Kidney Stones Using Computed Tomography of Kidneys, Ureters, and Bladder (CT KUB) as a Gold Standard

Kaz Bano; Mohammad Ashraf  Kasi; Nisar Ahmed; Ijaz Ahmed; Tehmina Sadiq

doi:10.51253/pafmj.v76i3.12226

Authors

Kaz Bano Department of Radiology, Armed Forces Institute of Radiology and Imaging/National University of Medical Sciences (NUMS) Rawalpindi Pakistan
Mohammad Ashraf Kasi Department of Radiology, Bolan Medical Complex Hospital, Quetta, Pakistan
Nisar Ahmed Department of Radiology, Armed Forces Institute of Radiology and Imaging/National University of Medical Sciences (NUMS) Rawalpindi Pakistan
Ijaz Ahmed Department of Medicine, Pak Emirates Military Hospital/National University of Medical Sciences (NUMS), Rawalpindi Pakistan
Tehmina Sadiq Department of Radiology, Armed Forces Institute of Radiology and Imaging/National University of Medical Sciences (NUMS) Rawalpindi Pakistan

DOI:

https://doi.org/10.51253/pafmj.v76i3.12226

Keywords:

Computed tomography, Hydronephrosis, Ultrasonography

Abstract

Objective: To determine the diagnostic accuracy of Color Doppler ultrasonography (USG) and compare it with CT KUB as the gold standard in detecting kidney stones.

Study Design: Cross-sectional study

Place and Duration of study: Department of Radiology, Bolan Medical Complex Hospital, Quetta, Pakistan, from Jun to Dec 2022.

Methodology: Two hundred and twenty-eight (228) patients of nephrolithiasis were selected by using a non-probability consecutive sampling technique. Patients (both male and female), fulfilling the inclusion criteria, were included in the study. Ultrasonography (USG) and Computed tomography (CT), done by separate experienced radiologists, of all patients were carried out, and the required findings were noted. Data was compiled and analyzed with SPSS version 23.0.

Results: As per the comparison between USG and CT-KUB findings, the results of our study revealed that US had a sensitivity and specificity of 92.6% and 100.0%, respectively. While positive predictive value, negative predictive value, and accuracy of US were 100%, 74.1%, and 93.9%, respectively, with a p-value < 0.001.

Conclusion: Despite limitations in the diagnosis of urinary stones, US can be used as an initial assessment tool. The sensitivity and specificity of US for diagnosis of renal, ureteric stones, and hydronephrosis are variable. Moreover, size of the stone, stone type, and location also affect it.

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