Stent graft visualization and planning tool for endovascular surgery using finite element analysis

Sachsen, Sandra von; Senf, Björn; Burgert, Oliver; Meixensberger, Jürgen; Florek, H.-J.; Mohr, Friedrich W.; Etz, Christian D.

doi:10.1007/s11548-013-0943-2

Cited by 1 publication

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References 18 publications

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“…hip [1,2] and knee arthroplasty [3,4]), dental implants [5,6], reconstructive surgery [7,8], etc. In cardiovascular surgery, the most prominent applications are stenting procedures [9,10,11], valve replacements [12] and aneurysm repair [13].…”

Section: Introductionmentioning

confidence: 99%

Comparison of in vivo vs. ex situ obtained material properties of sheep common carotid artery

Smoljkic

Verbrugghe

Larsson

et al. 2018

Medical Engineering & Physics

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Patient-specific biomechanical modelling can improve preoperative surgical planning. This requires patient-specific geometry as well as patient-specific material properties as input. The latter are, however, still quite challenging to estimate in vivo. This study focuses on the estimation of the mechanical properties of the arterial wall. Firstly, in vivo pressure, diameter and thickness of the arterial wall were acquired for sheep common carotid arteries. Next, the animals were sacrificed and the tissue was stored for mechanical testing. Planar biaxial tests were performed to obtain experimental stress-stretch curves. Finally, parameters for the hyperelastic Mooney-Rivlin and Gasser-Ogden-Holzapfel (GOH) material model were estimated based on the in vivo obtained pressure-diameter data as well as on the ex situ experimental stress-stretch curves. Both material models were able to capture the in vivo behaviour of the tissue. However, in the ex situ case only the GOH model provided satisfactory results. When comparing different fitting approaches, in vivo vs. ex situ, each of them showed its own advantages and disadvantages. The in vivo approach estimates the properties of the tissue in its physiological state while the ex situ approach allows to apply different loadings to properly capture the anisotropy of the tissue. Both of them could be further enhanced by improving the estimation of the stress-free state, i.e. by adding residual circumferential stresses in vivo and by accounting for the flattening effect of the tested samples ex vivo. • Competing interests: none declared • Word count: 4716.

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Section: Introductionmentioning

confidence: 99%

Comparison of in vivo vs. ex situ obtained material properties of sheep common carotid artery

Smoljkic

Verbrugghe

Larsson

et al. 2018

Medical Engineering & Physics

View full text Add to dashboard Cite

show abstract

Stent graft visualization and planning tool for endovascular surgery using finite element analysis

Abstract: The Medical Postprocessor visualization software tool for analyzing stent graft properties was evaluated by vascular surgeons. The results show that the software can assist the interpretation of simulation results to optimize stent graft configuration and sizing.

Cited by 1 publication

References 18 publications

Comparison of in vivo vs. ex situ obtained material properties of sheep common carotid artery

Comparison of in vivo vs. ex situ obtained material properties of sheep common carotid artery

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