OPEN ACCESS Jacobs Journal of Medical Diagnosis and Medical Imaging CT Classification of Ureteral Calculi Parameters for Predicting Ureteroscopy Complications

Results: Stone size greater than 0.67 centimeters and location in the proximal ureter were found to be statistically significant in predicting complications. When individualizing operative complications with stone characteristics, a stone density of 817 Hounsfield units (HU) or greater, stone size of 0.79 centimeters or greater, and operative time greater than 53 minutes all showed statistical significance for the presence of hematuria. Based on multivariate logistic regression, stones in the proximal 1/3 of the ureter were more likely to get complications than stones located in the middle and lower ureter with a hazard ratio of 4.3.