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Updated: Jul 9, 2026

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
Published on: March 25, 2022
Covered expandable nitinol stents for malignant gastroduodenal obstructions
Eun H Seo1, Min K Jung, Min J Park
1Department of Internal Medicine, Kyungpook National University Hospital, Daegu, South Korea.
Covered expandable Nitinol stents effectively treat malignant gastroduodenal obstructions, improving swallowing function. While generally safe, potential complications like stent migration and tumor ingrowth require monitoring for optimal patient outcomes.
Area of Science:
- Gastroenterology
- Interventional Endoscopy
- Oncology
Background:
- Malignant gastroduodenal obstructions present significant challenges in palliative care.
- Nitinol stents offer a minimally invasive approach to restore patency.
Purpose of the Study:
- To evaluate the clinical effectiveness and safety of covered expandable Nitinol stents.
- To assess outcomes in patients with malignant gastroduodenal obstructions.
Main Methods:
- A prospective study of 68 patients with malignant gastroduodenal obstructions.
- Placement of covered expandable Nitinol stents under endoscopic and fluoroscopic guidance.
- Assessment of technical success, dysphagia scores, stent patency, and complications.
Main Results:
- Technical success rate was 88.2% (60/68 patients).
- Mean dysphagia score significantly improved (3.5 to 1.2, P < 0.001).
- Major complications occurred in 27.9% of patients, with stent migration in 8.8%.
Conclusions:
- Covered expandable Nitinol stents are an effective and feasible palliative therapy.
- This treatment improves quality of life for patients with malignant gastroduodenal obstructions.
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