Maryam Javed, Faran Nasrullah, Shahlisa Hameedi.
Diagnostic Accuracy of Trans-Abdominal Ultrasonography in Urolithiasis, keeping CT KUB as Gold Standard.
J Islamabad Med Dent Coll Jan ;7(3):204-7.

Objective: To determine the diagnostic accuracy of trans-abdominal ultrasonography in urolithiasis, keeping CT KUB as gold standard.Material and Methods: This cross-sectional validation study was conducted at Armed Forces Institute of Radiology and Imaging, Military Hospital (MH) Rawalpindi from 15 July 2015 to 14 July 2016. In total 115 patients with expected urolithiasis were evaluated with transabdominal ultrasonography and the findings were documented. CT KUB of these patients was carried out. The sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of transabdominal ultrasonography were calculated, keeping findings of CT KUB as gold standard.Results: Among total of 115 patients, 54.78% (n=63) were males and 45.22% (n=52) were females. Mean age was 35.69 ± 5.91 years. Frequency of urolithiasis on CT KUB was recorded in 62.61% (n=72). The sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of transabdominal ultrasonography in urolithiasis was calculated as 65.27%, 72.09%, 79.66%, 55.36% and 67.83% respectively.Conclusion: The diagnostic accuracy of trans-abdominal ultrasonography in urolithiasis is acceptable for diagnosing urolithiasis and hence it may serve as an alternative in case of unavailability or contraindication to CT scan.

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