左冠状动脉生物力学:流体结构相互作用模拟的表征研究。

IF 3 3区 医学 Q2 BIOPHYSICS
Marina Fandaros, Chloe Kwok, Zachary Wolf, Michael Shearer, Johnathan Scheiner, Yulee Li, J Jane Cao, Wei Yin
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引用次数: 0

摘要

患者特异性冠状动脉生物力学研究通常样本量有限。本研究的目标是:(1)开发更多的患者特异性FSI模型,以扩大目前在表征冠状动脉血流动力学和生物力学条件方面的研究成果;(2)将我们的一些模型输出,特别是FSI模型生成的vFFR值与HeartFlow提供的结果进行比较,以评估我们的模型结果的临床相关性。使用COMSOL Multiphysics,使用10个健康LCA几何形状来开发患者特异性FSI模型。沿着左冠状动脉前降支(LAD)的近端、中端和远端部分,评估动脉壁的血流动力学和生物力学环境。将FSI模型计算的vFFR与匹配的HeartFlow报告进行比较。所有FSI模型均显示灌注正常。与近端LAD的HeartFlow计算结果吻合良好。FSI模型结果表明,壁面应力低于破裂阈值。然而,沿动脉长度观察到von-Mises应力和应变的变化。FSI模型通过包含大视野,为LCA模拟提供了更好的生理相关性。生物力学参数与几何特征的关系最小,因此需要进行该手术。这种FSI建模方法存在一些局限性。需要做更多的工作来解决这些局限性,并提高FSI建模的生理相关性,以便它可以作为一种非侵入性的方法来评估冠状动脉的生物力学,以支持临床医生的决策。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Left coronary artery biomechanics: a characterization study using fluid structure interaction simulations.

Patient-specific coronary artery biomechanics studies often have limited sample size. The goals of this study were: (1) To develop more patient-specific FSI models to expand current research effort in characterizing hemodynamic and biomechanical conditions within the coronary arteries; (2) to compare some of our model outputs, especially FSI model-generated vFFR values, to those provided by HeartFlow, to evaluate the clinical relevance of our model results. Ten healthy LCA geometries were used to develop patient-specific FSI models using COMSOL Multiphysics. The hemodynamic and biomechanical environment in the arterial wall were assessed, along the proximal, mid, and distal portions of the left anterior descending coronary artery (LAD). The FSI model-calculated vFFR was compared to the matched HeartFlow reports. All FSI models indicated healthy perfusion. There was a good agreement with the HeartFlow calculation in the proximal LAD. The FSI model results indicated that the wall stresses were below the rupture thresholds. However, variations were observed along the arterial length in the von-Mises stress and strains. The FSI models offered improved physiological relevance for LCA simulation by including a large field of view. The biomechanical parameters were minimally related to geometric features, necessitating this procedure. This FSI modeling approach presented a few limitations. More work is needed to address these limitations and improve the physiological relevance of FSI modeling, so it can serve as a non-invasive method to assess the biomechanics of the coronary arteries, to support clinician's decision making.

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来源期刊
Biomechanics and Modeling in Mechanobiology
Biomechanics and Modeling in Mechanobiology 工程技术-工程:生物医学
CiteScore
7.10
自引率
8.60%
发文量
119
审稿时长
6 months
期刊介绍: Mechanics regulates biological processes at the molecular, cellular, tissue, organ, and organism levels. A goal of this journal is to promote basic and applied research that integrates the expanding knowledge-bases in the allied fields of biomechanics and mechanobiology. Approaches may be experimental, theoretical, or computational; they may address phenomena at the nano, micro, or macrolevels. Of particular interest are investigations that (1) quantify the mechanical environment in which cells and matrix function in health, disease, or injury, (2) identify and quantify mechanosensitive responses and their mechanisms, (3) detail inter-relations between mechanics and biological processes such as growth, remodeling, adaptation, and repair, and (4) report discoveries that advance therapeutic and diagnostic procedures. Especially encouraged are analytical and computational models based on solid mechanics, fluid mechanics, or thermomechanics, and their interactions; also encouraged are reports of new experimental methods that expand measurement capabilities and new mathematical methods that facilitate analysis.
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