Korean J Urol.
1994 Apr;35(4):365-369.
Accuracy of Residual Urine Volume Determination by Ultrasonography
- Affiliations
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- 1Department of Urology, Seoul Adventist Hospital, Seoul, Korea.
Abstract
- The determination of the residual urine volume is an essential part of the investigation of many urological patients. particularly those with suspected urinary outflow obstruction. In 31 patients, we measured 3 internal bladder diameters ( height, width and depth) by transabdominal ultrasonography and calculated the residual urine volume by formula for ellipsoid (V= phi /6 xH xW xD).The real volume was obtained by the catheterization and compared with the sonographic measurement. There was a best correlation (r=0.9748) between calculated and true volumes provided a correction factor of 1.15 was applied. The advantages of ultrasonography for assessing residual urine volume are that it is simple, quick, harmless, non-invasive and readily repeatable. If the basic equipment is available, the ultrasonography should replace the catheterization.
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