Computational analysis of effects of external carotid artery flow and occlusion on adverse carotid bifurcation hemodynamics Sinjae Hyun, PhD, Clement.

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Date of download: 7/8/2016 Copyright © ASME. All rights reserved. From: Effect of Inlet Velocity Profiles on Patient-Specific Computational Fluid Dynamics.

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Computational analysis of effects of external carotid artery flow and occlusion on adverse carotid bifurcation hemodynamics Sinjae Hyun, PhD, Clement Kleinstreuer, PhD, Joseph P Archie, PhD, MD Journal of Vascular Surgery Volume 37, Issue 6, Pages 1248-1254 (June 2003) DOI: 10.1016/S0741-5214(02)75326-3

Fig 1 Occlusion geometry for six carotid bifurcations studied. A, Normal carotid artery bifurcation geometry. B, Distal ECA occlusion. C, Proximal stump carotid occlusion. D, Proximal smooth ECA occlusion. E, Proximal smooth ECA occlusion without carotid sinus. F, Optimal reconstruction excluding ECA. In A-C, divider and ECA wall surfaces excluded from computational analysis are shown. Journal of Vascular Surgery 2003 37, 1248-1254DOI: (10.1016/S0741-5214(02)75326-3)

Fig 2 Volume time flow waveforms when ratio of ECA flow to ICA flow is 0.5. A, Normal waveforms. B, Damped ECA waveform with same profile as normal ICA waveform. Journal of Vascular Surgery 2003 37, 1248-1254DOI: (10.1016/S0741-5214(02)75326-3)

Fig 3 Time-averaged and area-averaged WSSAG and OSI for normal and damped ECA waveforms over range of ratio of ECA to ICA flow for normal carotid artery bifurcation geometry (see Fig 1, A). Journal of Vascular Surgery 2003 37, 1248-1254DOI: (10.1016/S0741-5214(02)75326-3)

Fig 4 Distribution of time-averaged local values for WSS, WSSAG, and OSI along walls opposite flow divider for a normal carotid bifurcation (see Fig 1, A) with normal (solid lines) and damped (dashed lines) flow waveforms. A, CCA-ICA WSS distribution. B, CCA-ECA WSS distribution. C, CCA-ICA WSSAG distribution. D, CCA- ECA WSSAG distribution. E, CCA-ICA OSI distribution. F, CCA-ECA OSI distribution. Journal of Vascular Surgery 2003 37, 1248-1254DOI: (10.1016/S0741-5214(02)75326-3)

Fig 5 Distribution of time-averaged local values for WSS, WSSAG, and OSI along CCA and ICA walls opposite the divider when ECA is occluded. Journal of Vascular Surgery 2003 37, 1248-1254DOI: (10.1016/S0741-5214(02)75326-3)

Fig 6 WSSAG and OSI values for five ECA occlusion geometry studies shown in Fig 1, B-F. Journal of Vascular Surgery 2003 37, 1248-1254DOI: (10.1016/S0741-5214(02)75326-3)