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Chinese Journal of Interventional Radiology(Electronic Edition) ›› 2025, Vol. 13 ›› Issue (02): 135-142. doi: 10.3877/cma.j.issn.2095-5782.2025.02.007

• Non-vascular Intervention • Previous Articles    

Iodine-125 seeds strip combined with double self-expandable metallic stents for treatment of bismuth type Ⅲ-Ⅳ malignant biliary obstruction

Chuanguo Zhou1, Yong Zhang1, Keyun Liu1, Hui Li1, Xiangyu Yang1, Kun Gao1,()   

  1. 1. Department of Interventional Radiology, Beijing Chaoyang Hospital, The Affiliated Hospital of Capital Medical University, Beijing 100020, China
  • Received:2024-07-15 Online:2025-05-25 Published:2025-06-20
  • Contact: Kun Gao

Abstract:

Objective

Evidence has shown that the combination of a 125I seed strip and selfexpanding metal stents (SEMS) placement may prolong both survival and stent patency times in patients with malignant biliary obstruction (MBO).However, no research has been published on the application of 125I seed strips combined with double SEMS placement for the treatment of Bismuth type Ⅲ-Ⅳ hilar MBO.Therefore, we conducted a retrospective analysis to evaluate the effectiveness and safety of this combination in treating Bismuth type Ⅲ-Ⅳ hilar MBO.

Methods

A total of 215 patients with MBO received 125I seed strip combined with SEMS placement treatment; among these, 26 patients with type Ⅲ-Ⅳ hilar MBO received the 125I seed strip combined with double SEMS placement.We analyzed the patients' characteristics, SEMS placement methods, technical success rate, clinical success rate, overall survival time, stent patency time, and complications.

Results

Among the 26 patients, there were 7 cases of type Ⅲ hilar MBO and 19 cases of typeⅣ hilar MBO.Four types of stent placement techniques were used: X-type, T-type, Y-type, and tandem type.X-type stent placement technique accounted for 11.5% (3/26); T-type for 23.1% (6/26); Y-type for 38.5% (10/26);and tandem type for 26.9% (7/26).The technical success rate was 96.2%, and the clinical success rate was 100%.The median survival time was 208.0±14.5 days (95% confidence interval: 179.6-236.4), and the median stent patency time was 178.0±21.1 days (95% confidence interval: 136.7-219.3).No serious complications were observed.

Conclusion

The results of this study indicate that the combination of 125I seed strips with double SEMS placement is safe and effective in managing patients with Bismuth type Ⅲ-Ⅳ hilar MBO.

Key words: Hilar malignant biliary obstruction, Iodine-125, Self-expandable metallic stents

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