Wall expansion assessment of an intracranial aneurysm model by a 3D Digital Image Correlation System

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Rodrigues, R.O. (Author) Other; Pinho, D. (Author) Other; David Bento (Author) Other; Rui Lima (Author) FEUP; Ribeiro, J. (Author) Other

Journal

Title: Measurement: Journal of the International Measurement Confederation

Vol. 88

Pages: 262-270

ISSN: 0263-2241

Publisher: Elsevier

Indexing

ISI Web of Science

Scopus

INSPEC

Other information

DOI: 10.1016/j.measurement.2016.03.045

Abstract (EN): Intracranial aneurysm is a local dilatation of an intracranial artery with high risk of rupture and death. Although it is generally accepted that the weakening of the arterial wall is the main cause for the rupture of an aneurysm, it still no consensus about the reasons for its creation, expansion and rupture. In particular, what is the role played by the blood flow in these phenomena. In this way, the aim of this work is the in vitro mechanical assessment of the wall expansion, namely the displacements, deformations and strains occurring in a saccular intracranial aneurysm model, when subjected to different flow rates. To obtain new insights into the mechanisms involved in the aneurysm rupture, a 3D-VicTM Digital Image Correlation System was used and validated with a finite element analysis. The wall expansion results have revealed that the displacements, deformations and principal strains are directly related to the internal pressure caused by the fluid on the wall of the aneurism. These findings were especially observed in the weakened areas of the aneurysm model, where the wall was thinner. Furthermore, the technique used in this study has shown to be a potential method to validate numerical simulations of aneurysms, allowing the future performance of more complex and realistic haemodynamic studies.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9