Abstract: Objective To investigate the clinical value and adverse reactions of indwelling ureteral stents in the prevention of ureteral injury before complex pelvic tumor surgery.Methods 145 cases of patients with rectal cancer,cervical cancer,ovarian cancer and pelvic sarcomas were retrospectively analyzed,and 53 patients with complex pelvic tumor surgery,preoperative were under cystoscope unilateral or bilateral ureteral stent tube,pulled out according to the intraoperative situation after surgery or lien,92 patients as control group.Results Ureteral injury was found in 10 of the 145 patients,2 cases in ureteral catheter group and 8 cases in control group.3 cases of postoperative ureteral fistula occurred in the control group.Indwelling ureteral stents could cause adverse reactions such as hematuria,osphyalgia and urinary irritation,and the adverse reactions of catheter group was obviously higher than that of control group(P＜0.05).Conclusion Cystoscopic ureteral stent placement has important clinical significance for prevention of ureteral injury despite certain adverse reactions,which can be used in operation of complex pelvic tumor.

Key words: Pelvic tumor, Ureteral injury, Ureteral catheter, Adverse reaction