中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (37): 5998-6004.doi: 10.3969/j.issn.2095-4344.2015.37.018

• 组织构建与生物力学 tissue construction and biomechanics • 上一篇    下一篇

颈内动脉虹吸部血流动力学模拟与影响因素

黄丽丹1,2,邓丽珠2,赵文俊2,陈丽君3,段少银2,3   

  1. 1厦门市中医院放射科,福建省厦门市  361003; 2福建医科大学协和临床学院,福建省福州市  350001; 3厦门大学附属中山医院影像科,福建省厦门市  361004
  • 出版日期:2015-09-10 发布日期:2015-09-10
  • 通讯作者: 段少银,博士,教授,主任医师,厦门大学附属中山医院,福建省厦门市 361004
  • 作者简介:黄丽丹,女,1981年生,福建省漳州市人,汉族,2015年福建医科大学毕业,医学硕士,主治医师。
  • 基金资助:

    国家自然科学基金(81071214)

Hemodynamics simulation of internal carotid artery siphon and relevant influential factors

Huang Li-dan1, 2, Deng Li-zhu2, Zhao Wen-jun2, Chen Li-jun3, Duan Shao-yin2, 3   

  1. 1Department of Radiology, Xiamen Hospital of Traditional Chinese Medicine, Xiamen 361003, Fujian Province, China; 2Union Clinic Medical College of Fujian Medical University, Fuzhou 350001, Fujian Province, China; 3Department of Radiology, Zhongshan Hospital of Xiamen University, Xiamen 361004, Fujian Province, China
  • Online:2015-09-10 Published:2015-09-10
  • Contact: Duan Shao-yin, M.D., Professor, Chief physician, Union Clinic Medical College of Fujian Medical University, Fuzhou 350001, Fujian Province, China; Department of Radiology, Zhongshan Hospital of Xiamen University, Xiamen 361004, Fujian Province, China
  • About author:Huang Li-dan, Master, Attendidng physician, Department of Radiology, Xiamen Hospital of Traditional Chinese Medicine, Xiamen 361003, Fujian Province, China; Union Clinic Medical College of Fujian Medical University, Fuzhou 350001, Fujian Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81071214

摘要:

背景:颈内动脉虹吸部走行弯曲、周围结构复杂,解剖学、影像学测量研究较多,并成为相关领域的研究热点,但目前对颈内动脉虹吸部血流动力学的相关研究报道较少,利用有限元分析技术,为相关动力学研究提供了基础。

目的:明确颈内动脉虹吸部正常及狭窄血液动力学特点,探讨血流动力学的影响因素。

方法:利用64排螺旋CT扫描获得DICOM数据实现颈内动脉虹吸部有限元建模,分别在Mimics 10.01软件上进行三维模型的实体构建,用ANSYS 13.0 CFX软件模拟仿真人类颈内动脉虹吸部正常及狭窄后血流,观察正常血流及狭窄后血流动力学的改变,分析其特点与差异。

结果与结论:颈内动脉虹吸部正常血流在弯曲的虹吸部呈层流状态,但经过两个折角时血流发生旋动与湍流。血流经折角内弯区较快,外弯区较慢,速度越慢湍流越明显;折角处剪切力较小,同时折角外弯区剪切力较内弯区小。动脉狭窄后血流经狭窄区速度加快,狭窄下游形成湍流及低剪切力区;随狭窄程度增大,湍流、低剪切力区域扩大,中央性狭窄比偏心性狭窄影响大。结果证实,颈内动脉虹吸部弯曲、管腔狭窄直接影响湍流及低剪切力区形成,以外弯区及中央性狭窄影响明显。

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

关键词: 组织构建, 组织工程, 颈内动脉, 狭窄, 计算流体力学, 有限元模型, 国家自然科学基金

Abstract:

BACKGROUND: The siphon of internal carotid artery is a complex of bending and surrounding structure, which has become a research hot in the field of medical imaging and regional anatomy. There is little research on the hemodynamics of internal carotid artery. Finite element analysis provides the basis for the related dynamics research.

OBJECTIVE: To explicit the hemodynamic characteristics of the normal and stenosis internal carotid artery, and to explore the relevant influential factors.

METHODS: Finite element model of the siphon of internal carotid artery was built based on 64-slice spiral CT data, and then, three-dimensional models were constructed using Mimics 10.01 software. There were simulations of the normal and post-stenosis blood flows with ANSYS 13.0 CFX software, to observe the changes of hemodynamics, and to analyze their characteristics and differences.

RESULTS AND CONCLUSION: The normal blood flow at the siphon of internal carotid artery was in a laminar state, but rotation and turbulent flow formed at the two angle regions. The velocity of external bending zone was slower than that of the internal. The slower was the velocity, the more obvious was the turbulence. The wall shear  force decreased at the angle regions, and the wall shear force of external bending zone was smaller than that of the internal. At the region of arterial stenosis, the blood flow was sped, and at the downstream, turbulent flow and low zone of wall shear force were formed. With the increase of stenosis severity, the turbulent flow and low wall shear force area were expanded. Central stenosis showed more obvious effects than the eccentric one. The degree of stenosis and bending at the siphon of internal carotid artery can directly influence the formation of turbulent flow and low wall shear force area, which are more obvious at the external bending zone and central stenosis.

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: Tissue Engineering, Biomechanics, Carotid Artery, Internal, Finite Element Analysis

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