Modelling a Nitinol device for the repair of abdominal aortic aneurysms

E. McCummiskey, W.M. Dempster, D.H. Nash, T.R. Ashton, D.G. Stevenson

Research output: Contribution to conferencePaper

Abstract

Abdominal aortic aneurysms (AAAs) are areas of localised swelling in the abdominal aorta due to a weakening of the arterial wall. The performance of a nitinol endovascular device for AAA repair is primarily dictated by its ability to seal the aneurysm from the blood flow and endure continuous cyclic loading due to blood pressure pulsations. The functionality of the device relies heavily on the use of superelastic nitinol to withstand the large deformations that occur during deployment and operation of the device. In the present work the proximal ring of the device is modelled using FE analysis to ascertain the strain levels in vivo. Tests on the material have been carried out to establish its specific stress-strain characteristic in the development of the FE model and both compression-tension dissimilarities and low magnitude cycling effects have been investigated.
Original languageEnglish
Pages653-663
Number of pages12
DOIs
Publication statusPublished - 2008
EventProceedings of the ASM International Conference on Shape Memory and Superelastic Technologies - Pacific Grove, California, USA
Duration: 7 May 200611 May 2006

Conference

ConferenceProceedings of the ASM International Conference on Shape Memory and Superelastic Technologies
CityPacific Grove, California, USA
Period7/05/0611/05/06

Keywords

  • nitinol
  • aortic aneurysms
  • mechanical engineering

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