Bifurcated stent-graft for abdominal aortic aneurysm

Area of Science:

• Vascular Surgery
• Medical Devices
• Interventional Radiology

Background:

• Abdominal aortic aneurysm (AAA) repair is a significant vascular procedure.
• Bifurcated stent-grafts offer a less invasive approach to AAA treatment.
• Optimizing stent-graft techniques is crucial for improving patient outcomes.

Purpose of the Study:

• To evaluate the efficacy and safety of bifurcated stent-graft implantation for abdominal aortic aneurysm.
• To assess the impact of evolving techniques and patient selection on treatment success.
• To analyze complication rates and identify factors influencing outcomes.

Main Methods:

• A retrospective analysis of 57 patients undergoing bifurcated stent-graft repair for AAA.
• Patients were grouped based on treatment period (20, 20, 17 patients).
• Serial computed tomography (CT) scans were used for follow-up up to 3 years, assessing aneurysm exclusion and complications.

Main Results:

• Success rates (aneurysm exclusion) increased progressively across groups: 55%, 70%, and 100%.
• Perigraft leaks (endoleaks) decreased from 4/20 to 1/17.
• Graft kinking and thrombosis were eliminated in later groups (last 37 patients) with routine stent support.

Conclusions:

• Refinements in patient selection and surgical technique have led to a significant increase in short-term success rates for bifurcated stent-graft implantation in AAA.
• Aggressive management of endoleaks and routine stent support for graft limbs improved procedural safety and efficacy.
• Proximal stent migration was associated with short or thrombus-lined infrarenal necks, highlighting the importance of anatomical assessment.