Abstract: This study explored the clinical value of preoperative CT examination parameters to predict ureteral chimerism in patients with ureteral stones. Sixty-eight patients with ureteral incarcerated stones were selected as the incarcerated group, and ninety-eight patients without ureteral incarcerated were selected as the control group. Both groups received CT scan befor operation. The sensitivity, specificity and AUC of stone length in the diagnosis of ureteral calculi incarceration were 83.15%, 70.69% and 0.836, respectively. The sensitivity, specificity and AUC of ureteral calculi incarceration were 78.85%, 61.33% and 0.745, respectively. The results of logistic regression model showed that the risk of ureteral calculi incarceration in patients with ipsilateral calculi surgery history, increased ureteral wall thickness, longer calculi length and larger calculi volume was higher (P<0.05). The load parameters of CT examination of stones have a certain value for the diagnosis of patients with stone incarceration. The increase in the length and diameter of stones and the thickening of the ureteral wall will increase the risk of stone incarceration in patients.

Key words: CT examination, prediction, ureteral stones, incarcerated stones