Abstract：Objective： To evaluate the safety and effectiveness of the new ALLIUM ureteral stent in the treatment of ureteral stricture. Methods： A total of 7 patients with ureteral stricture undergoing ALLIUM ureteral stent placement in our hospital from September to December 2019 were enrolled. Among them, there were 3 cases of unilateral or bilateral ureteral stricture due to postoperative radiotherapy for cervical cancer, 2 cases of recurrent ureteral stricture after pyloplasty of ureteropelvic junction obstruction of solitary kidney, and one case of unilateral ureteral stricture after ureteroscopic lithotripsy. There was one case of solitary kidney with pelvic lipomatosis leading to ureteral stricture. In all cases, we used a 30 Fr, 10 cm or 12 cm self-expanding ALLIUM ureteral stent. All stents were transurethrally placed following balloon dilatation. Two cases were implanted with bilateral ALLIUM stents, and one case was implanted with two ALLIUM stents in unilateral ureter. A total of 10 ureteral stents were placed, and the median follow-up time was 4 months （range 4-7 months）. Results： Preoperative hydronephrosis in 6 cases was significantly relieved, and no cases had urine extravasation, lumbago, hematuria and urinary tract infection. One case had mild pelvic effusion, and all patients had complete stenosis expansion verified by radiography and CT. The median postoperative hospital stay was 3 days. Trans-location of stents was observed in 2 cases during the follow-up. The stent fell into the bladder two months after the operation in one case, and safely removed by the endoscopic maneuver. The incomplete ureteral obstruction occurred due to kidney stone incarceration in one case. The rest stents were in a good position during follow-up, and the patients did not complain lower back pain, hematuria, and urinary tract irritation signs. Conclusion： The short-term results showed that the new ALLIUM ureteral stent is safe and effective in treating ureteral stricture, but more cases and longer follow-up are needed to validate the efficacy.
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