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Finite Element Analysis of the Mechanical Performances of 8 Marketed Aortic Stent-Grafts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Demanget, Nicolas Duprey, Ambroise Badel, Pierre Orgéas, Laurent Avril, Stéphane Geindreau, Christian Albertini, J. N. Favre, Jean-Pierre |
| Copyright Year | 2013 |
| Abstract | Purpose To assess numerically the flexibility and mechanical stresses undergone by stents and fabric of currently manufactured stent-grafts. Methods Eight marketed stent-graft limbs (Aorfix, Anaconda, Endurant, Excluder, Talent, Zenith Flex, Zenith LP, and Zenith Spiral-Z) were modeled using finite element analysis. A numerical benchmark combining bending up to 180° and pressurization at 150 mmHg of the stent-grafts was performed. Stent-graft flexibility, assessed by the calculation of the luminal reduction rate, maximal stresses in stents, and maximal strains in fabric were assessed. Results The luminal reduction rate at 90° was <20% except for the Talent stent-graft. The rate at 180° was higher for Z-stented models (Talent, Endurant, Zenith, and Zenith LP; range 39%–78%) than spiral (Aorfix, Excluder, and Zenith Spiral-Z) or circular-stented (Anaconda) devices (range 14%–26%). At 180°, maximal stress was higher for Z-stented stent-grafts (range 370–622 MPa) than spiral or circular-stented endografts (range 177–368 MPa). At 90° and 180°, strains in fabric were low and did not differ significantly among the polyester stent-grafts (range 0.5%–7%), while the expanded polytetrafluoroethylene fabric of the Excluder stent-graft underwent higher strains (range 11%–18%). Conclusion Stent design strongly influences mechanical performances of aortic stent-grafts. Spiral and circular stents provide greater flexibility, as well as lower stress values than Z-stents, and thus better durability. |
| Starting Page | 523 |
| Ending Page | 535 |
| Page Count | 13 |
| File Format | PDF HTM / HTML |
| DOI | 10.1583/12-4063.1 |
| PubMed reference number | 23914862 |
| Journal | Medline |
| Volume Number | 20 |
| Alternate Webpage(s) | https://hal.archives-ouvertes.fr/hal-00880940/document |
| Alternate Webpage(s) | http://people.3sr-grenoble.fr/users/lorgeas/papers/demanget_duprey_badel_orgeas_avril_geindreau_albertini_favre_2013_jevt.pdf |
| Alternate Webpage(s) | https://hal.archives-ouvertes.fr/hal-00880940/file/ND-JET-20-Orig.pdf |
| Alternate Webpage(s) | https://doi.org/10.1583/12-4063.1 |
| Journal | Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
