Related Experiment Video
Updated: May 18, 2026
11:49
Autologous Endothelial Progenitor Cell-Seeding Technology and Biocompatibility Testing For Cardiovascular Devices in Large Animal Model
Published on: September 9, 2011
The best conditions for parallel stenting during EVAR: an in vitro study
G Mestres1, J P Uribe, C García-Madrid
1Vascular Surgery Division, Department of Cardiovascular Surgery, Thorax Institute, Hospital Clinic, University of Barcelona, Spain. gasparmestres@gmail.com
Summary
Optimal juxtarenal aneurysm repair involves 30% endograft oversizing for better stent apposition. This technique minimizes guttering and stent compression, crucial for endovascular aneurysm repair (EVAR) success.
Area of Science:
- Endovascular Surgery
- Medical Device Engineering
- Aortic Aneurysm Treatment
Background:
- Juxtarenal abdominal aortic aneurysms pose challenges for endovascular repair.
- The parallel-stent technique is an alternative for treating juxtarenal aneurysms.
- Optimizing endograft and stent selection is critical for sealing and durability.
Purpose of the Study:
- To determine the optimal endograft and parallel stent combination for juxtarenal aneurysm neck sealing.
- To evaluate the impact of endograft oversizing on fit and sealing in parallel-stent techniques.
- To compare different endograft and stent types for their performance in vitro.
Main Methods:
- In vitro testing using silicon models of juxtarenal aneurysm necks.
- Evaluation of two endografts (Medtronic Endurant, Gore Excluder) and two parallel stents (Gore Viabahn, Atrium Advanta V12).
- Assessment of three oversizing degrees (15%, 30%, 40%) and computed tomography (CT) analysis of sealing and stent behavior.
Main Results:
- 30% endograft oversizing significantly reduced gutter areas compared to 15% and 40% oversizing.
- 40% oversizing led to endograft infolding, especially with Gore Excluder devices.
- Medtronic Endurant with Gore Viabahn showed maximum parallel stent compression (35%).
Conclusions:
- 30% endograft oversizing provides superior endograft-stent apposition in juxtarenal necks.
- Gore Excluder and Atrium Advanta V12 resulted in wider gutters but less stent compression.
- The Medtronic Endurant-Gore Viabahn combination achieved the tightest seal but with significant stent compression.
