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KMID : 1004720070060010019
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Korean Journal of Endourology
2007 Volume.6 No. 1 p.19 ~ p.23
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The Reason for Operating Helical Computerized Tomography as Prior Examination in Place of intravenous Urography in Patients with Urinary Calculus
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Kim Sang-Chul
Moon Young-Tae
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Abstract
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Purpose: This study was performed to ascertain the reason for operating helical computerized tomography (CT) as prior examination in place of intravenous urography (IVU) in patients with urinary calculus. And we evaluate the reason why urinary calculus was not diagnosed on IVU in patients were operated prior IVU.
Patients & Methods: Between June 2003 and June 2006, 3664 patients with acute flank pain, suspected of having urinary calculus, visited in our hospital. Sixty-nine patients were underwent helical CT. Of 69 patients, 46 patients had been confirmed as urinary calculus. And 3596 patients were underwent IVU as first line examination. In these patients, 125 patients were equivocal about the urinary calculi and then underwent helical CT. We investigated reason for operating helical CT as prior examination in place of IVU in patients and reason why failure of diagnosis on IVU with urinary calculus.
Results: About 1.8% of patients underwent helical CT in place of IVU. The reasons for operating helical CT were as follows: For rule out acute abdomen and other disease (56.7%), radiolucent stone (15.3%), abnormal renal shadow in KUB (10.9%), already preservation CT due to other disease (4.3%), history of radiocontrast allergy (4.3%), multiple calcification of abdomen in KUB (4.3%), suspicious bilateral ureteral stones (2.1%), decreased renal function (2.1%).
The reasons for failure of diagnosis of urinary calculus on IVU was as follows: Tiny low ureteral stone was hided by plebolith and bowel gas (56.0%), middle ureteral stone overlap the pelvic bone (25.6%), radiolucent stone (18.4%)
Conclusions: Helical CT was used very restrictively as first line method for acute flank pain. The heical CT as first line examination about urinary calculi that may be more available for low and middle ureteral stone and radiolucent urinary stone than IVU.
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KEYWORD
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Urinary calculi, Helical computerized tomography
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