單一醫學中心使用Allium輸尿管支架治療難治性輸尿管狹窄之50例初步經驗

游斯鴻、李建儀、王賢祥、楊晨洸、陳正哲

台中榮民總醫院 泌尿醫學部

Initial Experience of 50 Cases of Allium Stent for Refractory Ureteral Stricture in a Single Medical Center

Ssu-Hung Yu, Jian-Ri Li, Shian-Shiang Wang, Cheng-Kuang Yang, Cheng-Che Chen

Department of Urology, Taichung Veterans General Hospital, Taiwan

Purpose:

We assessed the efficacy and safety of Allium stents for refractory ureteral strictures.

Materials and Methods:

We retrospectively reviewed patients who underwent ureteral Allium stent placement between April 1, 2023, and December 31, 2025. A total of 50 patients were included in this study. We recorded the size of the Allium stents and evaluated changes in hydronephrosis status and serum creatinine levels at baseline (preoperatively), at 3 months postoperatively, and at the last outpatient follow-up. Stent-related complications were also documented. Treatment success was defined as improvement in the grade of hydronephrosis or in renal function.

Results:

The mean age of the patients was 56.3 years. Females accounted for 56% of the cohort, and 50% of stents were placed on the right side. Stent placement was indicated for ureteral stones in 26% of patients and for retroperitoneal fibrosis in another 26%. Regarding stent characteristics, 58% of patients received stents measuring 12 cm in length, 40% received 20 cm stents, and 2% received 10 cm stents. The mean follow-up duration was 10.1 months. Compared with preoperative levels, serum creatinine improved in 55.5% of patients at 3 months postoperatively and in 37% at the final follow-up. Improvement in hydronephrosis was observed in 76.5% of patients at 3 months and in 66% at the final follow-up. In terms of adverse events, 10% of patients developed febrile urinary tract infections, 8% experienced hematuria, and 6% had stent migration, of which 66.6% were downward migrations. No cases of encrustation were observed. Overall, the treatment success rate was 71.7%.

Conclusion:

Allium stent is a minimal invasive, safe and alternative method to treat refractory ureteral stricture.