Investigation of the hemodynamic flow conditions and blood‐induced stresses inside an abdominal aortic aneurysm by means of a SPH numerical model

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Abstract

The estimation of blood flow‐induced loads occurring on the artery wall is affected by uncertainties hidden in the complex interaction of the pulsatile flow, the mechanical parameters of the artery, and the external support conditions. To circumvent these difficulties, a specific tool is developed by combining the aorta displacements measured by an electrocardiogram‐gated computer tomography angiography, with the blood velocity field computed by a Smoothed Particle Hydrodynamics (SPH) numerical model. In the present work, the SPH model has been specifically adapted to the solution of the 3D Navier–Stokes equations inside a domain with boundaries of prescribed motion. Images of the Abdominal Aorta Aneurysm (AAA) of a 44‐year‐old female patient were acquired during a stabilized cardiac cycle by electrocardiogram‐gated computed tomography angiography. The in‐vivo kinematic field inside the pulsating arterial wall was estimated by using recent technology, which makes it possible to follow the shape of the arterial wall during a cardiac cycle. We compare the flow conditions and the blood‐induced loads, computed by the numerical model under the assumption of a moving arterial wall, with the corresponding results obtained assuming three rigid wall geometries of the vessel during the cardiac cycle. Significant differences were found for the wall shear stress distribution.
Lingua originaleEnglish
Numero di pagine51
RivistaInternational Journal for Numerical Methods in Biomedical Engineering
Stato di pubblicazionePublished - 2019

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Aneurysm
Angiography
Hydrodynamic Model
Hemodynamics
Abdominal Aortic Aneurysm
Hydrodynamics
Cardiac
Tomography
Numerical models
Aorta
Blood
Arteries
Cycle
Pulsatile Flow
Pulsatile flow
Abdominal Aorta
Biomechanical Phenomena
Uncertainty
Stress concentration
Shear stress

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title = "Investigation of the hemodynamic flow conditions and blood‐induced stresses inside an abdominal aortic aneurysm by means of a SPH numerical model",
abstract = "The estimation of blood flow‐induced loads occurring on the artery wall is affected by uncertainties hidden in the complex interaction of the pulsatile flow, the mechanical parameters of the artery, and the external support conditions. To circumvent these difficulties, a specific tool is developed by combining the aorta displacements measured by an electrocardiogram‐gated computer tomography angiography, with the blood velocity field computed by a Smoothed Particle Hydrodynamics (SPH) numerical model. In the present work, the SPH model has been specifically adapted to the solution of the 3D Navier–Stokes equations inside a domain with boundaries of prescribed motion. Images of the Abdominal Aorta Aneurysm (AAA) of a 44‐year‐old female patient were acquired during a stabilized cardiac cycle by electrocardiogram‐gated computed tomography angiography. The in‐vivo kinematic field inside the pulsating arterial wall was estimated by using recent technology, which makes it possible to follow the shape of the arterial wall during a cardiac cycle. We compare the flow conditions and the blood‐induced loads, computed by the numerical model under the assumption of a moving arterial wall, with the corresponding results obtained assuming three rigid wall geometries of the vessel during the cardiac cycle. Significant differences were found for the wall shear stress distribution.",
author = "Marco Sinagra and Tullio Tucciarelli and Costanza Arico' and Enrico Napoli",
year = "2019",
language = "English",
journal = "International Journal for Numerical Methods in Biomedical Engineering",
issn = "2040-7939",
publisher = "Wiley-Blackwell",

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TY - JOUR

T1 - Investigation of the hemodynamic flow conditions and blood‐induced stresses inside an abdominal aortic aneurysm by means of a SPH numerical model

AU - Sinagra, Marco

AU - Tucciarelli, Tullio

AU - Arico', Costanza

AU - Napoli, Enrico

PY - 2019

Y1 - 2019

N2 - The estimation of blood flow‐induced loads occurring on the artery wall is affected by uncertainties hidden in the complex interaction of the pulsatile flow, the mechanical parameters of the artery, and the external support conditions. To circumvent these difficulties, a specific tool is developed by combining the aorta displacements measured by an electrocardiogram‐gated computer tomography angiography, with the blood velocity field computed by a Smoothed Particle Hydrodynamics (SPH) numerical model. In the present work, the SPH model has been specifically adapted to the solution of the 3D Navier–Stokes equations inside a domain with boundaries of prescribed motion. Images of the Abdominal Aorta Aneurysm (AAA) of a 44‐year‐old female patient were acquired during a stabilized cardiac cycle by electrocardiogram‐gated computed tomography angiography. The in‐vivo kinematic field inside the pulsating arterial wall was estimated by using recent technology, which makes it possible to follow the shape of the arterial wall during a cardiac cycle. We compare the flow conditions and the blood‐induced loads, computed by the numerical model under the assumption of a moving arterial wall, with the corresponding results obtained assuming three rigid wall geometries of the vessel during the cardiac cycle. Significant differences were found for the wall shear stress distribution.

AB - The estimation of blood flow‐induced loads occurring on the artery wall is affected by uncertainties hidden in the complex interaction of the pulsatile flow, the mechanical parameters of the artery, and the external support conditions. To circumvent these difficulties, a specific tool is developed by combining the aorta displacements measured by an electrocardiogram‐gated computer tomography angiography, with the blood velocity field computed by a Smoothed Particle Hydrodynamics (SPH) numerical model. In the present work, the SPH model has been specifically adapted to the solution of the 3D Navier–Stokes equations inside a domain with boundaries of prescribed motion. Images of the Abdominal Aorta Aneurysm (AAA) of a 44‐year‐old female patient were acquired during a stabilized cardiac cycle by electrocardiogram‐gated computed tomography angiography. The in‐vivo kinematic field inside the pulsating arterial wall was estimated by using recent technology, which makes it possible to follow the shape of the arterial wall during a cardiac cycle. We compare the flow conditions and the blood‐induced loads, computed by the numerical model under the assumption of a moving arterial wall, with the corresponding results obtained assuming three rigid wall geometries of the vessel during the cardiac cycle. Significant differences were found for the wall shear stress distribution.

UR - http://hdl.handle.net/10447/376863

M3 - Article

JO - International Journal for Numerical Methods in Biomedical Engineering

JF - International Journal for Numerical Methods in Biomedical Engineering

SN - 2040-7939

ER -