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In Vitro Validation of Finite Element Analysis of Blood Flow in Deformable Models

Content Provider	Springer Nature Link
Author	Kung, Ethan O. Les, Andrea S. Figueroa, C. Alberto Medina, Francisco Arcaute, Karina Wicker, Ryan B. McConnell, Michael V. Taylor, Charles A.
Copyright Year	2011
Abstract	The purpose of this article is to validate numerical simulations of flow and pressure incorporating deformable walls using in vitro flow phantoms under physiological flow and pressure conditions. We constructed two deformable flow phantoms mimicking a normal and a restricted thoracic aorta, and used a Windkessel model at the outlet boundary. We acquired flow and pressure data in the phantom while it operated under physiological conditions. Next, in silico numerical simulations were performed, and velocities, flows, and pressures in the in silico simulations were compared to those measured in the in vitro phantoms. The experimental measurements and simulated results of pressure and flow waveform shapes and magnitudes compared favorably at all of the different measurement locations in the two deformable phantoms. The average difference between measured and simulated flow and pressure was approximately 3.5 cc/s (13% of mean) and 1.5 mmHg (1.8% of mean), respectively. Velocity patterns also showed good qualitative agreement between experiment and simulation especially in regions with less complex flow patterns. We demonstrated the capabilities of numerical simulations incorporating deformable walls to capture both the vessel wall motion and wave propagation by accurately predicting the changes in the flow and pressure waveforms at various locations down the length of the deformable flow phantoms.
Starting Page	1947
Ending Page	1960
Page Count	14
File Format	PDF
ISSN	00906964
Journal	Annals of Biomedical Engineering
Volume Number	39
Issue Number	7
e-ISSN	15739686
Language	English
Publisher	Springer US
Publisher Date	2011-03-15
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Blood flow Phase-contrast MRI Computational fluid dynamics Wave propagation Physiological pressure Boundary condition Deformable phantom Windkessel Couple-momentum Fluid–solid interaction Mechanics Biochemistry Biophysics and Biological Physics Biomedical Engineering Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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