Skin temperature oscillation model for assessing vasomotion of microcirculation  

作　　者：Yuan-Liang Tang Ying He Hong-Wei Shao Irina Mizeva 

机构地区：[1]School of Energy and Power Engineering, Dalian University of Technology [2]Department of Modern Mechanics, University of Science and Technology of China [3]Institute of Continuous Media Mechanics, Ural Branch of Russian Academy of Science

出　　处：《Acta Mechanica Sinica》2015年第1期132-138,共7页力学学报（英文版）

基　　金：supported by Anhui Provincial Natural Science Foundation of China(11040606M09)

摘　　要：It has been proved that there exists a certain cor relation between fingertip temperature oscillations and blood flow oscillations. In this work, a porous media model of hu man hand is presented to investigate how the blood flow os cillation in the endothelial frequency band influences finger tip skin temperature oscillations. The porosity which repre sents the density of micro vessels is assumed to vary periodi cally and is a function of the skin temperature. Finite element analysis of skin temperature for a contra lateral hand under a cooling test was conducted. Subsequently, wavelet anal ysis was carried out to extract the temperature oscillations of the data through the numerical analysis and experimen tal measurements. Furthermore, the oscillations extracted from both numerical analyses and experiments were statis tically analyzed to compare the amplitude. The simulation and experimental results show that for the subjects in cardio vascular health, the skin temperature fluctuations in endothe lial frequency decrease during the cooling test and increase gradually after cooling, implying that the assumed porosity variation can represent the vasomotion in the endothelial fre quency band.It has been proved that there exists a certain cor relation between fingertip temperature oscillations and blood flow oscillations. In this work, a porous media model of hu man hand is presented to investigate how the blood flow os cillation in the endothelial frequency band influences finger tip skin temperature oscillations. The porosity which repre sents the density of micro vessels is assumed to vary periodi cally and is a function of the skin temperature. Finite element analysis of skin temperature for a contra lateral hand under a cooling test was conducted. Subsequently, wavelet anal ysis was carried out to extract the temperature oscillations of the data through the numerical analysis and experimen tal measurements. Furthermore, the oscillations extracted from both numerical analyses and experiments were statis tically analyzed to compare the amplitude. The simulation and experimental results show that for the subjects in cardio vascular health, the skin temperature fluctuations in endothe lial frequency decrease during the cooling test and increase gradually after cooling, implying that the assumed porosity variation can represent the vasomotion in the endothelial fre quency band.

关 键 词：Finite element method. Wavelet analysis Tem-perature oscillation Blood flow Endothelial function Va-somotion 

分 类 号：R543[医药卫生—心血管疾病]