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Year :2017
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Month :
March-April
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Volume :
6
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Issue :
2
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Page :
RO81 - RO86
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Determination of Attenuation Values of Urinary Calculi by Non-Contrast Computed Tomography and Correlation with Outcome of Extracorporeal Shock Wave Lithotripsy – A Prospective Study
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Correspondence Address :
Deepti Naik, Aditi Jain, Amna Arunachala Hegde, Ashok Adekal Kumar,
Dr. Deepti Naik,
312, 4th A Cross, OMBR Layout,
Bengaluru-560043, Karnataka, India.
E-mail: drdeepti2004@hotmail.com
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Introduction: Introduction: Urolithiasis is a common disease with an increasing incidence worldwide. Non-Contrast Computed Tomography (NCCT) is the gold standard imaging modality for the patient presenting with acute renal colic. Extracorporeal Shock Wave Lithotripsy (ESWL) has emerged as the treatment of choice for urolithiasis. The attenuation value in Hounsfield units evaluated by NCCT is reported to be a strong predictive factor for the successful outcome of ESWL.
Aim: To determine the attenuation value of urinary calculi by NCCT and to correlate it with the outcome of ESWL.
Materials and Methods: This study is a prospective analytical study. In all 75 urolithiasis patients who have undergone NCCT and ESWL at M.S Ramaiah Medical College and Hospitals, Bengaluru, India between November 2013 to June 2015 were considered for the study.
Results: The successful outcome post ESWL in different groups of attenuation value are 100% in group 1(<500HU), 92.6% in Group 2(500-1000HU) and 33.3% in Group 3(>1000HU). The failure rate was 7.3% in Group 1 and 66.6% in Group 3. The calculus density above 1000 HU decreases the rate of successful outcome post ESWL.
Conclusion: The attenuation value of the urinary calculi estimated by NCCT predicts the ESWL outcome thus identifying patients suitable to undergo ESWL.
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