Abstract
Atherosclerosis in the carotid artery is one of the main risk factors for stroke. Arterial compliance, a measure of the elasticity of blood vessels, is a common indicator of vascular disease and is known to decrease in association with other stroke risk factors, including age, diabetes, and hypertension. Decreased local compliance leads to changes in the flow and pressure waveforms and corresponding changes in the velocity field. Resulting hemodynamic parameters, such as shear stress and turbulence, play a primary role in the process of plaque and clot formation. The aim of this work was to analyze the effect of compliance on carotid artery flow patterns and turbulence intensity experimentally within carotid artery phantoms. This was accomplished using Particle image velocimetry (PIV), an established engineering technique for measuring velocity fields with high temporal and spatial resolution that can be applied to study specific aspects of the flow system when used in controlled test models. Results showed slightly higher overall velocities in rigid phantoms compared to geometricallymatched compliant versions. A stiffer vessel wall resulted in increased maximum average turbulence intensities, 0.41±0.02 m/s in compliant models and 0.48±0.03 m/s in rigid phantom models. The rigid vessel region of maximum turbulence also occurred more upstream compared to the bifurcation apex.
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© 2015 Springer International Publishing Switzerland
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DiCarlo, A.L., Poepping, T. (2015). Investigation of flow and turbulence in carotid artery models of varying compliance using particle image velocimetry. In: Jaffray, D. (eds) World Congress on Medical Physics and Biomedical Engineering, June 7-12, 2015, Toronto, Canada. IFMBE Proceedings, vol 51. Springer, Cham. https://doi.org/10.1007/978-3-319-19387-8_423
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DOI: https://doi.org/10.1007/978-3-319-19387-8_423
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-19386-1
Online ISBN: 978-3-319-19387-8
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