What if you stretch the IFU? A mechanical insight into stent graft Instructions For Use in angulated proximal aneurysm necks
| Autor: | S. De Bock, Benedict Verhegghe, M. De Beule, Francesco Iannaccone, Patrick Segers, Frank Vermassen |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Finite Element Analysis Biomedical Engineering Biophysics Prosthesis Design Endovascular aneurysm repair Contact force Aneurysm Suprarenal Aorta medicine Humans Computer Simulation Fixation (histology) business.industry Endovascular Procedures Models Cardiovascular Stent medicine.disease Abdominal aortic aneurysm Blood Vessel Prosthesis Surgery Instructions for use Stents business Algorithms Aortic Aneurysm Abdominal |
| Zdroj: | Medical Engineering & Physics. 36:1567-1576 |
| ISSN: | 1350-4533 |
| DOI: | 10.1016/j.medengphy.2014.08.003 |
| Popis: | Endovascular treatment for patients with a proximal neck anatomy outside instructions for use is an ongoing topic of debate in endovascular aneurysm repair. This paper employs the finite element method to offer insight into possible adverse effects of deploying a stent graft into an angulated geometry. The effect of angulation, straight neck length and device oversize was investigated in a full factorial parametric analysis. Stent apposition, area reduction of the graft, asymmetry of contact forces and the ability to find a good seal were investigated. Most adverse effects are expected for combinations of high angulation and short straight landing zones. Higher oversize has a beneficiary effect, but not enough to compensate the adverse effects of (very) short and angulated angles. Our analysis shows that for an angle between the suprarenal aorta and proximal neck above 60°, proximal kinking of the device can occur. The method used offers a engineering view on the morphological limits of EVAR for a clinically used device. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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