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.

Conference

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

Fingerprint

Repair
Blood pressure
Seals
Swelling
Blood

Keywords

  • nitinol
  • aortic aneurysms
  • mechanical engineering

Cite this

McCummiskey, E., Dempster, W. M., Nash, D. H., Ashton, T. R., & Stevenson, D. G. (2008). Modelling a Nitinol device for the repair of abdominal aortic aneurysms. 653-663. Paper presented at Proceedings of the ASM International Conference on Shape Memory and Superelastic Technologies, Pacific Grove, California, USA, . https://doi.org/10.1361/cp.2006smst653
McCummiskey, E. ; Dempster, W.M. ; Nash, D.H. ; Ashton, T.R. ; Stevenson, D.G. / Modelling a Nitinol device for the repair of abdominal aortic aneurysms. Paper presented at Proceedings of the ASM International Conference on Shape Memory and Superelastic Technologies, Pacific Grove, California, USA, .12 p.
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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.",
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author = "E. McCummiskey and W.M. Dempster and D.H. Nash and T.R. Ashton and D.G. Stevenson",
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McCummiskey, E, Dempster, WM, Nash, DH, Ashton, TR & Stevenson, DG 2008, 'Modelling a Nitinol device for the repair of abdominal aortic aneurysms' Paper presented at Proceedings of the ASM International Conference on Shape Memory and Superelastic Technologies, Pacific Grove, California, USA, 7/05/06 - 11/05/06, pp. 653-663. https://doi.org/10.1361/cp.2006smst653

Modelling a Nitinol device for the repair of abdominal aortic aneurysms. / McCummiskey, E.; Dempster, W.M.; Nash, D.H.; Ashton, T.R.; Stevenson, D.G.

2008. 653-663 Paper presented at Proceedings of the ASM International Conference on Shape Memory and Superelastic Technologies, Pacific Grove, California, USA, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Modelling a Nitinol device for the repair of abdominal aortic aneurysms

AU - McCummiskey, E.

AU - Dempster, W.M.

AU - Nash, D.H.

AU - Ashton, T.R.

AU - Stevenson, D.G.

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PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - nitinol

KW - aortic aneurysms

KW - mechanical engineering

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DO - 10.1361/cp.2006smst653

M3 - Paper

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McCummiskey E, Dempster WM, Nash DH, Ashton TR, Stevenson DG. Modelling a Nitinol device for the repair of abdominal aortic aneurysms. 2008. Paper presented at Proceedings of the ASM International Conference on Shape Memory and Superelastic Technologies, Pacific Grove, California, USA, . https://doi.org/10.1361/cp.2006smst653