Diagnostic Accuracy of Ultrasound in Detecting Ureteric Stone Keeping Non-Enhanced CT as Gold Standard
Background: Urolithiasis is common presentation to surgical department and the diagnosis of this is necessary for the early diagnosis of the location and presence of ureteric stones. Objective: To determine the sensitivity of trans-abdominal ultrasound in detecting stone in ureter. Study Design: Cross-sectional study. Settings: Urology department of Institute Kidney Disease, Peshawar Pakistan. Duration: 1st February 2019 to 31st July 2019. Methodology: All the patients with suspected renal colic presenting to urology department were included in the study. All those patients with any previous history of ureteric surgery or documented presence of ureteric stone were excluded from the study. Ultrasound was done focusing on the ureter of both sides of the patient. Then it was sent for non-enhanced CT scan using Acquilion multi slice (64) CT scanner. The results of the CT scan were interpreted by another consultant radiologist. Results: Total of 80 patients were examined. Mean age of the patient was 36.47± 8.243 years. Female were 43 (53.8%) while male were 37 (46.3%). The trans-abdominal ultrasound was having sensitivity of 69.64%, specificity of 66.6%, PPV of 82.92%, NPV of 48.48% and accuracy of 68.75% for detecting the ureteric stone. Conclusion: The ultrasound abdomen for diagnosis of ureteric stone have a greater positive predictive value but the sensitivity is comparable with other result.