Accuracy of ultrasound versus computed tomography urogram in detecting urinary tract calculi
- Author:
Salinawati Bakin
;
Erica Yee Hing
;
Fam Xeng Inn
;
Zulfiqar Mohd Annuar
- Publication Type:Journal Article
- Keywords:
Urinary tract calculi;
ultrasound;
computed tomography urogram;
urolithiasis;
nephrolithiasis
- MeSH:
Calculi;
Urinary Calculi
- From:
The Medical Journal of Malaysia
2015;70(4):238-241
- CountryMalaysia
- Language:English
-
Abstract:
Aim: To determine the (i) sensitivity and specificity of
ultrasound (USG) in the detection of urinary tract calculi, (ii)
size of renal calculi detected on USG, and (iii) size of renal
calculi not seen on USG but detected on computed
tomography urogram (CTU).
Methods: A total of 201 patients’ USG and CTU were
compared retrospectively for the presence of calculi.
Sensitivity, specificity, accuracy, positive predictive value
and negative predictive value of USG were calculated with
CTU as the gold standard.
Results: From the 201 sets of data collected, 59 calculi were
detected on both USG and CTU. The sensitivity and
specificity of renal calculi detection on USG were 53% and
85% respectively. The mean size of the renal calculus
detected on USG was 7.6 mm ± 4.1 mm and the mean size of
the renal calculus not visualised on USG but detected on
CTU was 4 mm ± 2.4 mm. The sensitivity and specificity of
ureteric calculi detection on USG were 12% and 97%
respectively. The sensitivity and specificity of urinary
bladder calculi detection on USG were 20% and 100%
respectively.
Conclusion: This study showed that the accuracy of US in
detecting renal, ureteric and urinary bladder calculi were
67%, 80% and 98% respectively.
- Full text:P020150908401283563698.pdf
