Diagnostic Accuracy of Ultrasound in Detection of Ureteric Calculi Taking CT KUB as Gold Standard

Objective: To assess the diagnostic accuracy of ultrasound in detection of ureteric calculi taking CT KUB as gold standard. Material and Method: Study design: Cross-sectional study. Setting: The study was conducted at Advance diagnostic Centre, Bilawal Medical College LUMHS Jamshoro Duration of study: Study duration was six months from April 2020 to September 2020. Methods: All the patients who were referred for CT KUB to diagnose the ureteric calculus, age more than 12 years and either of gender were included in this study. All the patients referred to CT KUB, underwent fresh transabdominal ultrasound after taking informed consent. All the data was recorded via self-made proforma. Data was analyzed by using SPSS version 20. 2X2 table was used to calculate the Sensitivity (SE), specificity (SP) "positive predictive value (PPV), negative predictive value (NPV) and accuracy of "trans abdominal ultrasound" by taking CT KUB as gold standard. Results: Mean age of total 60 cases was 36.6 +/- 8.49 years and mean duration of symptoms was 7.3 +/- 10.45 days. There were 51.7% males and 48.3% females. Ureteric calculi were detected among 68.3% of the cases on transabdominal ultrasound and 76.7% via CT KUB. Trans-abdominal ultrasound showed sensitivity 92% and specificity 44%, followed by positive predictive value (PPV) 90% and negative predictive value (NPP) 50% in the diagnosis of ureteric calculus by taking CT KUB as gold standard. Conclusion: Trans-abdominal ultrasonography was observed to be a safe, reliable, non-invasive, feasible and quick diagnostic tool to detect the ureteric calculus and severity of the obstruction.