Forty-seven patients who underwent RIRS for large stones underwent computed tomography with 3D reconstruction of stone volume. The overall success rate was 55.3% (26 of 47 patients), and the authors found that computed stone volume significantly correlated with stone free status.
Furthermore, they found that stone volume estimates using a scalene or oblate/prolate ellipsoid formula correlated well with 3D stone reconstruction volumes. This study ties in nicely with the aforementioned 2 reports by Al Kadhi and Peschechera in that RIRS likely has a size a limitation that adversely affects outcomes. Pre-operative stone assessment may aid the urologist in determining which patients are good candidates for RIRS.
Presented by O. Wiseman at the 29th World Congress of Endourology & SWL (WCE) - November 30 - December 3, 2011 - Kyoto International Conference Center - Kyoto, Japan
Reported for UroToday by Joseph Graversen, Fellow Minimally Invasive Surgery and Endourology, University of California-Irvine Medical Center, Irvine, CA
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