Artery Research

Volume 20, Issue C, December 2017, Pages 55 - 56

3.8 IMPLEMENTING FLUID-STRUCTURE INTERACTION COMPUTATIONAL AND EMPIRICAL TECHNIQUES TO ASSESS HEMODYNAMICS OF ABDOMINAL AORTIC ANEURYSMS

Authors
Hannah Safi1, Nathan Phillips1, Yiannis Ventikos2, Richard Bomphrey1
1Royal Veterinary College, UK
2University College London, UK
Available Online 6 December 2017.
DOI
10.1016/j.artres.2017.10.038How to use a DOI?
Abstract

An Abdominal Aortic Aneurysm (AAA) represents a degenerative disease process of the abdominal aorta that leads to a focal dilation and irreversible remodeling of the arterial wall [1].

The reliable assessment of AAA rupture risk in a clinical setting is crucial in decreasing related mortality without needlessly increasing the rate of surgical repair. Currently there is no accepted technique to quantify the risk of rupture for individual AAAs. Elective repair decisions are generally founded on the “maximum diameter criterion” [2].

A multi-disciplinary approach including constitutive modeling and vascular biomechanics is required to increase the effectiveness in assessing and treating the disease.

Guidelines for treatment of AAAs from the Society for Vascular Surgery indicate computationally acquired rupture predictors need additional validation prior to their implementation in clinics. For this purpose, silicone replicas of anatomically realistic geometries of AAAs are fabricated and the flow field in the aneurysmal region is experimentally measured in vitro, using time-resolved volumetric Particle Image Velocimetry (PIV) [34]. Furthermore, the experimental setup allows for strain measurements of the aneurysmal wall to be taken simultaneously using Digital Image Correlation (DIC).

These data are used to validate concurrent computational simulation results and FSI analyses. The results demonstrate that the FSI computational approach can predict the patterns of flow from the PIV measurements, which arise from the geometry of the AAA. This work highlights that empirical and computational modelling can complement each other to investigate AAA development towards our goal of producing validated computational simulations that can be used for diagnostic purposes.

Open Access
This is an open access article distributed under the CC BY-NC license.

References

1.KW Johnston, RB Rutherford, MD Tilson, et al., Suggested standards for reporting on arterial aneurysms. Subcommittee on Reporting Standards for Arterial Aneurysms, Ad Hoc Committee on Reporting Standards, Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery, Journal of Vascular Surgery, Vol. 13, 1991, pp. 452.
2.PM Brown, DT Zelt, and B Sobolev, The risk of rupture in untreated aneurysms: The impact of size, gender, and expansion rate, Journal of Vascular Surgery, Vol. 37, 2003, pp. 280-4.
3.P Henningsson, D Michaelis, T Nakata, D Schanz, R Geisler, A Schröder, and RJ Bomphrey, The complex aerodynamic footprint of desert locusts revealed by large-volume tomographic particle image velocimetry, Journal of the Royal Society Interface, 2015, pp. 12.
4.A Nila et al., Optical measurements of fluid-structure interactions for the description of nature-inspired wing dynamics, Royal Aeronautical Society, Bristol, UK, in 2016 RAeS Applied Aerodynamics Conference, 2016.
Journal
Artery Research
Volume-Issue
20 - C
Pages
55 - 56
Publication Date
2017/12/06
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2017.10.038How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - JOUR
AU  - Hannah Safi
AU  - Nathan Phillips
AU  - Yiannis Ventikos
AU  - Richard Bomphrey
PY  - 2017
DA  - 2017/12/06
TI  - 3.8 IMPLEMENTING FLUID-STRUCTURE INTERACTION COMPUTATIONAL AND EMPIRICAL TECHNIQUES TO ASSESS HEMODYNAMICS OF ABDOMINAL AORTIC ANEURYSMS
JO  - Artery Research
SP  - 55
EP  - 56
VL  - 20
IS  - C
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2017.10.038
DO  - 10.1016/j.artres.2017.10.038
ID  - Safi2017
ER  -