中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (15): 2403-2408.doi: 10.3969/j.issn.2095-4344.1174

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

颈动脉粥样硬化的流体力学模型:旋转手法下颈动脉粥样硬化斑块的血流动力学变化

陈奕历1,劳永华2,张少群1,吴宝烽3,李义凯1   

  1. (1南方医科大学,广东省广州市  510515; 2华南理工大学,广东省广州市  510006;3广州市惠爱医院,广东省广州市  510370)
  • 收稿日期:2018-12-20 出版日期:2019-05-28 发布日期:2019-05-28
  • 通讯作者: 李义凯,博士,教授,南方医科大学,广东省广州市 510515
  • 作者简介:陈奕历,男,1993年生,广东省和平县人,汉族,南方医科大学在读硕士,医师,主要从事生物力学、流体力学、颈椎推拿的研究。
  • 基金资助:

    国家自然科学基金面上项目(81273871),项目负责人:李义凯

Hydrodynamic model of carotid artery atherosclerosis: hemodynamic changes of carotid atherosclerotic plaques under cervical rotatory manipulation

Chen Yili1, Lao Yonghua2, Zhang Shaoqun1, Wu Baofeng3, Li Yikai1   

  1. (1Southern Medical University, Guangzhou 510515, Guangdong Province, China; 2South China University of Technology, Guangzhou 510006, Guangdong Province, China; 3Guangzhou Huiai Hospital, Guangzhou 510370, Guangdong Province, China)
  • Received:2018-12-20 Online:2019-05-28 Published:2019-05-28
  • Contact: Li Yikai, MD, Professor, Southern Medical University, Guangzhou 510515, Guangdong Province, China
  • About author:Chen Yili, Master candidate, Physician, Southern Medical University, Guangzhou 510515, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China (General Program), No. 81273871 (to LYK)

摘要:

文章快速阅读:

文题释义:
斑块壁面剪切力(average wall shear stress,AWSS):是时均和面均剪切力的综合,一个心动周期内斑块平均壁面剪切力的平均大小,即斑块长期受到的剪切力平均大小。
斑块最大壁面剪切力(maximum wall shear stress,Max_WSS):是一个心动周期内斑块处最大剪切力大小(某一时刻的一点),即斑块受到最大的剪切力。
斑块平均最大壁面剪切力(average maximum wall shear stress,Max_AWSS):是一个心动周期内,斑块受到最大剪切力时,斑块面所受到的平均壁面剪切力。
斑块上游剪切力、斑块下游剪切力:均和斑块壁面剪切力相同,也是时均和面均的综合,是斑块上下处长期受到的剪切力。
摘要
背景:
颈椎旋转推拿手法是颈椎病的非手术治疗方法之一,其疗效显著,但对颈动脉粥样硬化患者的安全性仍待探讨。
目的:分析颈椎旋转手法下粥样硬化颈动脉的血流动力学改变,探讨颈椎旋转手法对斑块血流动力学影响。
方法:筛选颈动脉分叉处狭窄伴有斑块MRI影像资料8例。建立颈动脉粥样硬化的流体力学模型,赋予通用血流边界条件,模拟手法旋转颈椎时颈动脉拉伸情况,将模型拉伸为无拉伸的对照组、7%拉伸组、16%拉伸组,模拟斑块的血流动力学参数变化。血流动力学指标分别为斑块壁面剪切力、斑块最大壁面剪切力、斑块平均最大壁面剪切力、斑块上游剪切力、斑块下游剪切力、斑块处血流速度和血流矢量图,对拉伸组与无拉伸对照组进行对照分析。
结果与结论:①7%拉伸组的血流动力学指标与对照组比较均无显著性差异(P > 0.05);16%拉伸组的血流动力学指标与对照组相比,斑块壁面剪切力、斑块最大壁面剪切力及斑块上游剪切力增大(P < 0.05),其余指标无显著差异;②结果提示,旋转手法对颈动脉的不同拉伸对斑块的影响不同,大幅度16%应变的拉伸可能会影响斑块的血流动力学情况。

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程
ORCID: 0000-0002-9460-1581(陈奕历)

关键词: 颈动脉, 动脉粥样硬化, 斑块, 血流动力学, 颈椎旋转手法, 有限元模拟, 斑块, 剪切力

Abstract:

BACKGROUND: Cervical rotation manipulation is a non-surgical method of cervical spondylosis, showing significant treatment efficacy. But the safety for patients with carotid artery atherosclerosis remains obscure.
OBJECTIVE: To analyze the hemodynamic changes of atherosclerotic carotid arteries treated by cervical rotatory manipulation, and to explore the effect of cervical rotatory manipulation on the hemodynamics of atherosclerotic plaque.
METHODS: Eight cases of stenosis of ramification of the carotid artery with plaque on MRI. The hemodynamic model of carotid artery atherosclerosis was established, assigned with general boundary conditions and simulated the cervical stretch during cervical rotatory manipulation. All models were grouped and stretched into 0% (control group), 7% and 16% stretch to simulate the hemodynamic changes of atherosclerotic plaque. The hemodynamic parameters, including average wall shear stress, the maximum wall shear stress, the average maximum wall shear stress, the blood velocity of the plaque, and blood flow vectorgraph were compared among groups.
RESULTS AND CONCLUSION: (1) All hemodynamic parameters had no significant differences between 7% stretch and control groups (P > 0.05). Compared with the control group, the wall shear stress, the maximum wall shear stress, and the maximum wall shear stress in the 16% stretch group were significantly increased (P < 0.05), and other indexes showed no significant differences. (2) In summary, different stretches by cervical rotatory manipulation possess different effects on plaque, and a 16% stretch may affect the hemodynamics of plaque.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Carotid Arteries, Atherosclerosis, Hemodynamics, Tissue Engineering

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