Lessons learned from aortic aneurysm stent graft failure; observations from several perspectives

Area of Science:

• Vascular Surgery
• Interventional Cardiology
• Biomedical Engineering

Background:

• Endovascular repair of abdominal aortic aneurysms (AAA) has become a common alternative to open surgery since its introduction in the US in 1995.
• Significant advancements in stent graft technology and techniques have been made, yet complications and failures continue to be reported.
• Understanding these failures is crucial for improving patient outcomes and refining endovascular repair strategies.

Purpose of the Study:

• To synthesize lessons learned from endovascular stent graft failures in abdominal aortic aneurysm repair.
• To classify AAA stent graft failures into distinct categories for better analysis and prevention.
• To provide a comprehensive overview based on clinical experience and existing literature.

Main Methods:

• Review of clinical experience with six different endograft types.
• Analysis of reported stent graft failures from medical literature.
• Classification of failures into three primary categories: patient selection, procedural, and device-related.

Main Results:

• Patient selection failures include unsuitable anatomy or comorbidities.
• Procedural failures encompass technical challenges during deployment and access.
• Device failures involve endograft malfunction, migration, or endoleaks.

Conclusions:

• Improving patient selection criteria can mitigate a significant portion of AAA repair failures.
• Standardizing procedural techniques and enhancing device reliability are essential for reducing complications.
• A systematic approach to classifying and addressing stent graft failures is vital for advancing endovascular AAA repair.