Analysis of Fluid–Structure Interaction Mechanisms for a Native Aortic Valve, Patient-Specific Ozaki Procedure, and a Bioprosthetic Valve

IF 3 2区 医学 Q3 ENGINEERING, BIOMEDICAL
Tom Fringand, Loic Mace, Isabelle Cheylan, Marien Lenoir, Julien Favier
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Abstract

The Ozaki procedure is a surgical technique which avoids to implant foreign aortic valve prostheses in human heart, using the patient’s own pericardium. Although this approach has well-identified benefits, it is still a topic of debate in the cardiac surgical community, which prevents its larger use to treat valve pathologies. This is linked to the actual lack of knowledge regarding the dynamics of tissue deformations and surrounding blood flow for this autograft pericardial valve. So far, there is no numerical study examining the coupling between the blood flow characteristics and the Ozaki leaflets dynamics. To fill this gap, we propose here a comprehensive comparison of various performance criteria between a healthy native valve, its pericardium-based counterpart, and a bioprosthetic solution, this is done using a three-dimensional fluid–structure interaction solver. Our findings reveal similar physiological dynamics between the valves but with the emergence of fluttering for the Ozaki leaflets and higher velocity and wall shear stress for the bioprosthetic heart valve.

Abstract Image

分析原生主动脉瓣、患者特异性尾崎手术和生物人工瓣膜的流体-结构相互作用机制。
尾崎手术是一种外科技术,它利用患者自身的心包,避免将外来的主动脉瓣假体植入人体心脏。虽然这种方法的优点已被证实,但在心脏外科界仍是一个争论不休的话题,这阻碍了它在治疗瓣膜病变方面的广泛应用。这与对这种自体移植心包瓣膜的组织变形和周围血流动力学缺乏了解有关。迄今为止,还没有任何数值研究对血流特性和尾崎瓣叶动力学之间的耦合进行过研究。为了填补这一空白,我们在此提出对健康的原生瓣膜、基于心包的同类瓣膜和生物人工瓣膜解决方案的各种性能标准进行综合比较,并使用三维流体与结构相互作用求解器进行比较。我们的研究结果表明,这两种瓣膜的生理动态相似,但 Ozaki 瓣膜会出现扑动,而生物人工心脏瓣膜的速度和壁剪应力更高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Annals of Biomedical Engineering
Annals of Biomedical Engineering 工程技术-工程:生物医学
CiteScore
7.50
自引率
15.80%
发文量
212
审稿时长
3 months
期刊介绍: Annals of Biomedical Engineering is an official journal of the Biomedical Engineering Society, publishing original articles in the major fields of bioengineering and biomedical engineering. The Annals is an interdisciplinary and international journal with the aim to highlight integrated approaches to the solutions of biological and biomedical problems.
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