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Related Experiment Videos

Endovascular vs open AAA repair: does size matter?

Stephen G Lalka1, Michael C Dalsing, Alan P Sawchuk

  • 1Division of Vascular Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA. sglalka@iupui.edu

Vascular and Endovascular Surgery
|August 5, 2005
PubMed
Summary

Aortic aneurysm repair suitability is determined by anatomy, not patient age or aneurysm size. Proximal aortic neck morphology is the primary factor excluding patients from endovascular repair, regardless of aneurysm dimensions.

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Area of Science:

  • Vascular Surgery
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Abdominal aortic aneurysms (AAAs) naturally increase in diameter and tortuosity with age.
  • AAAs enlarge over time, potentially affecting adjacent vital structures.
  • Early AAA repair (≥4.0 cm) might enhance endovascular repair applicability due to favorable aortoiliac anatomy.

Purpose of the Study:

  • To investigate the relationship between patient age, AAA size, and aortoiliac morphology for endovascular repair candidacy.
  • To determine if smaller AAAs are more likely to be anatomically suitable for endovascular repair.

Main Methods:

  • Retrospective analysis of 317 patients with aortoiliac aneurysms (infrarenal AAA ≥4.0 cm).
  • Evaluation of endovascular vs. open repair based on CT and angiographic imaging.

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  • Application of 10 anatomic exclusion criteria for the Zenith endograft.

    • Main Results:

    • 212 of 317 patients were excluded from endovascular repair based on aortoiliac morphology.
    • No significant difference in age or AAA size between excluded and included groups.
    • 87% of exclusions were due to proximal aortic neck morphology, independent of age or AAA size.

    Conclusions:

    • Aortoiliac morphology, not patient age or AAA size, dictates endovascular repair candidacy.
    • Patients with small AAAs (4.0-5.4 cm) are not more likely to be suitable for endovascular repair than those with larger AAAs.
    • Proximal aortic neck characteristics are the predominant factor for exclusion from endovascular AAA repair.