A retrospective analysis for predicting extracorporeal shock-wave lithotripsy in treating proximal ureteral stone

Abstract:

Objective：To evaluate the possible predictors of proximal ureteral stone disintegration by shock wave lithotripsy（SWL）. Methods：This retrospective study included 79 patients（61 males，18 females； mean age：43.5 years） who were performed non-en－hanced multi-detector computed tomography（MDCT） before SWL. The possible predictors such as gender，age，stone location，stone length，stone cross-sectional diameter，stone volume，body mass index（BMI），skin-to-stone distance（SSD），and stone density （Hounsfield unit，HU） were analyzed. Results：The stone length（P=0.038），cross-sectional diameter（P=0.001） and stone density（P=0.001） were significant different based on univariate analysis. By the multiple liner regression analysis，the stone density（RR=3.31，P=0.048） and cross-sectional diameter（RR=7.953，P=0.003） were considered to be the independent predictors of SWL success. Conclusion：Instead of stone length，the cross-sectional diameter and stone density were the independent predictors of SWL success.