Objective: To determine the impact of duration of ureteroscopy for urolithiasis on complication rates (CRs) of the procedure.
Methods: A retrospective analysis of 2,010 patients, treated between 2006 and 2011, was done. The operation time (OT) and the occurrence of complications were compared.
Results: The overall CR was 14.3% [298 complications, minor complications (Clavien I-II) 91.7%]. The median OT was 35 min [interquartile range (IQR) 20-61]. The OT differed significantly between those without complications [34 min (IQR 20-60)] and those with complications [45 min (IQR 25-76)] (p < 0.0001). The correlation between the OT and the occurrence of complications (r = -0.009648, p < 0.0001) was very weak and passed the level of significance (r = 0.2). The effect size was of minor relevance (Cohen's d = 0.27972).
Conclusions: Longer OT correlates significantly with a higher CR. The effect is however shown to be minor and the overall rate of complications, especially severe ones, is low.
Knipper S, Tiburtius C, Gross AJ, Netsch C. Are you the author?
Department of Urology, Asklepios Hospital Barmbek, Hamburg, Germany.
Reference: Urol Int. 2015 Jan 20. Epub ahead of print.