To explore the clinical value of ultrasound combined with CT in the diagnosis and treatment of distal ureteral calculi.

Clinical data of 103 patients with ureteral calculi who received diagnosis and surgical treatment in Benniu People's Hospital, Xinnorth District, Changzhou City from January 2022 to May 2024 were retrospectively analyzed. Ultrasonography and CT exploration were performed on all patients before surgery, and the single diagnosis and combined diagnosis of ultrasonography and CT as well as the location of calculi detected by operation and pathology were analyzed. The consistency of single diagnosis and combined diagnosis of ultrasound and CT with surgical pathological findings was calculated, and the efficacy of single or combined diagnosis of ultrasound and CT in the diagnosis of distal ureteral calculi was calculated using surgical pathological results as the gold standard. At the same time, all patients were re-examined by ultrasound and CT one week after surgery to observe the effect of stone removal.

According to kappa consistency test, the consistency of single ultrasound diagnosis and surgical pathological results was moderate (Kappa=0.607), the single CT diagnosis and surgical pathological results were highly consistent (Kappa=0.657), and the diagnosis of ultrasound combined with CT was completely consistent with surgical pathological results (Kappa=0.947). After calculation, the accuracy, sensitivity and specificity of CT single diagnosis of ureteral calculi were higher than those of ultrasound single diagnosis, but there was no significant difference between the two groups (P>0.05). The accuracy and sensitivity of ultrasound combined with CT in the diagnosis of distal ureteral calculi were significantly higher than those of ultrasound and CT alone (P<0.05). The specificity of ultrasound combined with CT in the diagnosis of distal ureteral calculi was higher than that of ultrasound and CT alone, but there was no significant difference between the two groups (P>0.05). One week after operation, 103 patients with ureteral calculi diagnosed by surgery and pathology were examined by ultrasound. The strong echo mass in the ureter disappeared before operation, and ureteral dilatation and intraluminal liquid echo were not detected. One week after operation, the CT scan of 103 patients showed that the high-density focus in the urinary tract and ureteral dilatation signs disappeared, and no hydronephrosis and obstructive renal parenchyma were detected. According to the results of ultrasound and CT exploration, the stone clearance rate was 100%.

Ultrasound and CT are effective in the diagnosis of distal ureteral calculi. The combined diagnosis of the two imaging techniques can further improve the accuracy and sensitivity of the diagnosis, reduce the occurrence of missed diagnosis, and evaluate the stone clearance by re examination of ultrasound and CT after operation, so as to provide effective image data support for clinical diagnosis and treatment.