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Article
Multidisciplinary Sciences
Ahmed G. Rahma et al.
Summary: This study investigates hemodynamics parameters and their impact on aneurysm rupture. Simulations are performed on both an ideal model and a realistic model reconstructed from patient-specific cerebral arteries. Computational fluid dynamics simulations are used to investigate hemodynamic parameters such as flow recirculation, wall shear stress, and wall pressure. The results indicate the presence of flow recirculation in the aneurysm zone, and the effect of flow recirculation on bulge hemodynamics wall parameters is discussed to identify the rupture zone.
SN APPLIED SCIENCES
(2023)
Article
Engineering, Biomedical
Wei Ma et al.
Summary: This study investigated the stenosis rates and locations of vertebral artery plaques and found that severe stenosis increases flow velocity, wall shear stress (WSS), and red blood cell (RBC) volume fraction at the stenosis. Narrow downstream spoiler and reflux areas possess low WSS and high erythrocyte volume fractions, accelerating plaque growth.
BIO-MEDICAL MATERIALS AND ENGINEERING
(2023)
Article
Biophysics
Li Changsheng et al.
Summary: This study reveals the effects of the anatomical structure of the iliac vein on hemodynamics through theoretical research and in vitro experimental verification. It establishes vascular models to simulate iliac vein stenosis with different rates, taper angles, and tilt angles. Computational fluid dynamics analysis of a real iliac vein model based on computed tomography angiography (CTA) images shows that iliac vein stenosis increases wall shear stress and the risk of thrombosis. The numerical simulation results are consistent with the theoretical research results, and the experimental study verifies the correctness of the simulation. This work provides a scientific reference for clinical treatment and diagnosis.
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2023)
Article
Engineering, Biomedical
Quanyu Wu et al.
Summary: Despite years of research, simulations for blood hydrodynamic problems, especially for the inlet of boundary conditions, have been largely incomplete. In this paper, different inlet boundary condition velocities were tested and compared in a human arm arterial model. The results showed that pressure and shear stress distributions varied with different velocities. The static pressure of the aortic tree was higher than the branch, while the shear stress of the aortic tree was lower than the branch. Furthermore, the vessel walls showed maximum deformation at the middle radial with different velocities.
BIOMEDICAL ENGINEERING-APPLICATIONS BASIS COMMUNICATIONS
(2022)
Article
Computer Science, Interdisciplinary Applications
Li Liu et al.
Summary: This study combined the finite element method and computational fluid dynamics to explore the hemodynamic mechanism of coil embolization in the treatment of sigmoid sinus diverticulum. The results showed that coil embolization reduced the average velocity, wall pressure, and wall shear stress of the sigmoid sinus, while increasing the proportion of low-velocity region in the cortical plate dehiscence area.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Biophysics
Ali A. Rostam-Alilou et al.
Summary: In this study, the interaction between blood and vessel tissue due to atherosclerotic occlusions was investigated for the first time. The results showed that existing occlusions in the arteries can significantly change the hemodynamic behavior and increase the risk of arterial tissue remodeling and aneurysm formation.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2022)
Article
Engineering, Multidisciplinary
Hyunwoo Jung et al.
Summary: This study investigated the differences in haemodynamic forces between carotid arteries that underwent primary closure or patch angioplasty using computational fluid dynamics. The study found that carotid arteries in the primary closure group were exposed to abnormal haemodynamic forces related to atherosclerosis, while the patch angioplasty group had smaller exposure to abnormal haemodynamic forces.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2022)
Article
Physiology
Yu Zhu et al.
Summary: This study evaluated the effect of aortic wall compliance on intraluminal hemodynamics in surgically repaired TAAD. The FSI model predicted lower blood velocities and WSS, and larger regions with disturbed flow and higher turbulence intensity compared to the rigid wall model. The effect of wall compliance on pressure difference between the true and false lumen was insignificant. The study demonstrated the importance of FSI simulation for accurate prediction of low WSS regions in surgically repaired TAAD.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Clinical Neurology
Junfeng Liu et al.
Summary: This study investigated the relationship between retinal microvasculature and cerebral hemodynamics in patients with internal carotid artery (ICA) stenosis. The results showed a strong correlation between retinal microvascular perfusion and cerebral perfusion in the superficial vascular layer, especially in patients with stenosis. Larger studies are needed to confirm these findings.
Article
Engineering, Mechanical
Nitesh Kumar et al.
Summary: Atherosclerosis is a localized complication that depends on rheology and arterial response to blood pressure. This study used a fluid-structure interaction model to investigate the hemodynamic parameters of normal and stenosed carotid artery models. The results showed that high blood pressure reduces wall shear stress and increases oscillatory shear index.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Ashkan Rafiei et al.
Summary: The main purpose of this study is to evaluate the influences of aneurysm geometric features on the hemodynamic conditions within the left coronary arteries. The results show that the geometric features of aneurysms can affect wall shear stress and blood flow circulation, and smaller LCA dilation size reduces the risk of blood clotting.
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
(2022)
Article
Engineering, Aerospace
A. B. Mazo et al.
Summary: The oscillating flow of a viscous incompressible fluid in a rigid circular pipe with local constriction has been numerically studied. This study is important for understanding the flow conditions and the effects of constriction in situations similar to blood flow in human arteries.
THERMOPHYSICS AND AEROMECHANICS
(2022)
Article
Physiology
Haifeng Wang et al.
Summary: Tissue degradation plays a crucial role in aneurysm formation and rupture. Computational analysis shows that TAWSS and OSI changes within the aneurysm dome due to degradation are inversely correlated and enhanced during the process. Degradation-induced hemodynamic changes may lead to self-amplification of progressive damage to the aneurysmal wall.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Medicine, General & Internal
Andrzej Polanczyk et al.
Summary: This study proposed a non-invasive method for analyzing mass flow rate/velocity and wall stress in type B aortic dissection using CTA and computational structural analysis. 3D computer models of the aorta were constructed from pre- and post-operative CT data, and CFD technique was used to quantify displacement forces and measure mass flow rate and wall stress. The CFD model identified areas with lower blood velocity and shear rate, indicating higher blood viscosity and likelihood of thrombus formation, as well as the impact of hematocrit levels on blood viscosity and flow dynamics.
Article
Engineering, Mechanical
Armando A. Soares et al.
Summary: The study investigates the influence of different inflow velocity profiles on hemodynamics at the abdominal aorta bifurcation. Results show that while inlet velocity profiles have an impact on hemodynamics at the bifurcation, this effect is less significant after the bifurcation. The correlation between results obtained using two different velocity profiles is close to 1 in the iliac arteries but drops to less than 0.6 in the abdominal region.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Biophysics
Jessica Benitez Mendieta et al.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2020)
Article
Cardiac & Cardiovascular Systems
Yanan Dai et al.
CARDIOVASCULAR ENGINEERING AND TECHNOLOGY
(2020)
Article
Biophysics
Hamed Keramati et al.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2020)
Article
Cardiac & Cardiovascular Systems
N. Pinho et al.
CARDIOVASCULAR ENGINEERING AND TECHNOLOGY
(2019)
Article
Biology
Han Hung Yeh et al.
COMPUTERS IN BIOLOGY AND MEDICINE
(2019)
Article
Computer Science, Information Systems
Andrzej Polanczyk et al.
Article
Biophysics
Peng Zhang et al.
JOURNAL OF BIOMECHANICS
(2014)
