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Sac enlargement without endoleak: when and how to convert and technical considerations
Marc R H M van Sambeek1, Johanna M Hendriks, Larissa Tseng
1Department of Vascular Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands. m.r.h.m.vansambeek@erasmusmc.nl
Seminars in Vascular Surgery
|December 23, 2004
Summary
Aneurysm sac enlargement after endovascular repair can lead to rupture, even without endoleaks. Regular monitoring of abdominal aortic aneurysm (AAA) volume is crucial for patient safety and preventing complications.
Area of Science:
- Vascular Surgery
- Endovascular Interventions
- Aortic Aneurysm Research
Background:
- Endovascular Aneurysm Repair (EVAR) aims to prevent rupture of Abdominal Aortic Aneurysms (AAA).
- AAA sac enlargement can occur post-EVAR, even without detectable endoleaks, posing a risk of rupture.
- The underlying mechanisms driving sac enlargement without endoleaks are not fully understood.
Purpose of the Study:
- To highlight the significance of AAA sac enlargement post-EVAR, irrespective of endoleaks.
- To emphasize the necessity of diligent surveillance, including aneurysm volume assessment, after EVAR.
- To discuss current and potential management strategies for endotension and AAA sac growth.
Main Methods:
- Review of existing literature on AAA sac behavior after endovascular repair.
- Analysis of the clinical implications of aneurysm sac enlargement and endotension.
- Evaluation of different management approaches, including open conversion and minimally invasive techniques.
Main Results:
- Aneurysm sac enlargement without endoleaks is a significant concern, potentially leading to AAA rupture.
- Continued pressurization of the AAA sac can cause dilatation of adjacent arteries, compromising graft seals.
- Current interventions like pharmacological instillation have shown limited success, while open conversion remains a pragmatic option.
Conclusions:
- Endovascular Aneurysm Repair (EVAR) for AAA is not a definitive solution, and long-term follow-up is mandatory.
- Regular monitoring of AAA sac size and volume is essential to detect enlargement and prevent rupture.
- Further research is needed to develop permanent solutions for endotension and AAA sac enlargement post-EVAR.