DocumentCode :
3064581
Title :
Spectral analysis on the microcirculatory laser Doppler signal at the acupuncture point
Author :
Hsiu, Hsin ; Hsu, Wei-Chen ; Hsu, Chia Liang ; Huang, Shih-Min ; Jan, Ming-Yie ; Wang, Wei-Kung ; Wang, Yuh-Ying Lin
Author_Institution :
Department of Electrical Engineering, Yuan Ze Univieristy, Taoyuan, Taiwan
fYear :
2008
fDate :
20-25 Aug. 2008
Firstpage :
1084
Lastpage :
1086
Abstract :
We aimed to characterize the frequency spectra of skin blood flow signals simultaneously recorded at Hoku, an important acupoint in oriental medicine, and two nearby nonacupoints to understand the underlying physiological mechanism of acupuncture points. ECG and laser Doppler flowmetry signals were measured simultaneously. A four-level Haar wavelet transform was applied to the measured 20-minute LDF signals, and periodic oscillations with five characteristic frequency peaks were obtained within the following frequency bands: 0.0095–0.021, 0.021–0.052, 0.052–0.145, 0.145–0.6, and 0.6–1.6 Hz (defined as FR1–FR5), respectively. The power in FR3 was significantly larger at Hoku than at the two nonacupoints. Spectral analysis of the flux signal revealed that one of the major microcirculatory differences between acupoints and nonacupoints was in the different myogenic responses of their vascular beds. This information may aid the development of a method to noninvasively study the microcirculatory characteristics of the acupoint.
Keywords :
Biomedical monitoring; Blood flow; Data acquisition; Electrocardiography; Frequency measurement; Heart rate; Sampling methods; Skin; Spectral analysis; Wavelet transforms; Acupuncture Points; Adult; Female; Humans; Laser-Doppler Flowmetry; Male; Microcirculation; Skin; Skin Physiological Phenomena; Spectrum Analysis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 2008. EMBS 2008. 30th Annual International Conference of the IEEE
Conference_Location :
Vancouver, BC
ISSN :
1557-170X
Print_ISBN :
978-1-4244-1814-5
Electronic_ISBN :
1557-170X
Type :
conf
DOI :
10.1109/IEMBS.2008.4649348
Filename :
4649348
Link To Document :
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