Pathophysiology of proximal perigraft endoleak following endovascular repair of abdominal aortic aneurysms: a study using a flow model

Eur J Vasc Endovasc Surg. 2001 Jul;22(1):53-6. doi: 10.1053/ejvs.2001.1385.

Abstract

Objective: to design a flow model to determine whether and why increased proximal neck angulation correlates with increased risk of proximal perigraft endoleak (PPE) flow.

Methods: a tapered stent-graft (Gianturco stent + Dacron) was deployed with proximal and distal necks made of silicone. The amount of PPE was measured over 30-s periods while the angulation of the proximal neck was increased.

Results: PPE flow increased significantly for angulations > or =30 degrees. The graft was lifted off the neck wall and gaps between the stent-graft and the neck created.

Conclusion: greater neck angulation increased PPE flow. The stent-graft was lifted off the neck and subsequent gaps created. This model could be used to compare available stent-grafts and to test new designs that would improve the seal in angulated necks.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anastomosis, Surgical
  • Aortic Aneurysm, Abdominal / surgery*
  • Blood Vessel Prosthesis Implantation / adverse effects*
  • Blood Vessel Prosthesis*
  • Humans
  • Models, Biological
  • Prosthesis Design
  • Regional Blood Flow
  • Stents