Title :
Study on Effect of External Pressure on Skin Blood Flow at Lower Limb Using Wavelet Analysis
Author :
Lu, Yehu ; Dai, Xiaoqun ; Lin, Hong
Author_Institution :
Nat. Nat. Eng. Lab. for Modern Silk, Soochow Univ., Suzhou, China
Abstract :
To understand circulation control mechanism of skin blood flow(SBF) responding to various stimulus, wavelet analysis was widely used. External pressure was one of the factors induced SBF response. In this study, SBF at ankle and calf under pressure of 20mmHg in sitting posture respectively were observed, then wavelet analysis on SBF signals was also carried out. The results showed that SBF increased when external pressure exerted no matter on ankle or calf. Moreover, the increment at ankle was bigger than that of calf. Wavelet analysis results showed that peak spectrum amplitude of intrinsic myogenic activity increased, while characteristic frequency decreased significantly(p<;0.01) due to pressure loading. It´s implicated that external pressure induced the change of myogenic activity and thus affected SBF.
Keywords :
Doppler measurement; blood flow measurement; flow visualisation; laser applications in medicine; laser velocimetry; muscle; skin; wavelet transforms; ankle; calf; characteristic frequency; circulation control mechanism; external pressure; laser Doppler flowmetry; lower limb; myogenic activity; pressure 20 mm Hg; pressure loading; sitting posture; skin blood flow; wavelet analysis; Biological tissues; Blood flow; Clothing; Frequency; Humans; Information analysis; Pressure control; Signal analysis; Skin; Wavelet analysis;
Conference_Titel :
Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4712-1
Electronic_ISBN :
2151-7614
DOI :
10.1109/ICBBE.2010.5516403
