Volume : VII, Issue : X, October - 2017

Efficacy of Ultrasonography for the Detection of Ureteral Stone

Manikandan M, Praveen N, Madhavan. N

Abstract :

 OBJECTIVE: To assess the efficacy of ultrasonography (US) for the detection of ureteral stone using non– contrast computed tomography (NCCT) as a standard reference.

 

MATERIALS AND METHODS: From December 2014 to April 2016, 209 patients underwent both NCCT and US. The sensitivity and specificity of US to detect ureteral stone was evaluated. The detection rates using US imaging were examined according to location and stone size. The sizes of stones determined in the longest axis of NCCT and US were compared. We also performed group classification based on size to examine whether stone sizes measured by NCCT and US were similar. Moreover, the factors that may affect the detection of ureteral stone by US were also analyzed.

 

RESULTS: Out of 418 ureters, NCCT could detect 133 stones, whereas US could detect 82 stones, yielding a sensitivity of 58.6 % and a specificity of 94.7%. Expectedly, detection rate of US increased with stone size but was lower for distal ureter (34.4%). With hydronephrosis, the sensitivity of US proved from 26.5% to 69.7%. Stone sizes measured by US correlated positively with those by computed tomography. Interestingly, stone size and the presence of hydronephrosis were factors that independentlyaffected ureteral stone detection by US.

 

CONCLUSION: The results indicate that, US may be useful as an initial imaging modality for detecting ureteral stone

Keywords :

Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Manikandan M, Praveen N, Madhavan. N, Efficacy of Ultrasonography for the Detection of Ureteral Stone, INDIAN JOURNAL OF APPLIED RESEARCH : Volume-7 | Issue-10 | October-2017

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