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Measurement of Bio-impedance Spectroscopy and It’s Application in Study of Channel and Collateral

Author: ShiYanLi
Tutor: LiGang
School: Tianjin University
Course: Biomedical Engineering
Keywords: Bioimpedance Meridian impedance Acupuncture OK needle practices
CLC: R224.1
Type: Master's thesis
Year: 2007
Downloads: 171
Quote: 1
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Abstract


Bio- impedance measurement as a noninvasive detection method , in terms of human physiology, pathology parameters monitoring with a wide range of applications , especially in the meridian impedance studies can play a good role . Bio - impedance measurement by a single frequency gradually developed multiple frequency impedance spectroscopy measurements , impedance spectroscopy measurements on the analysis of human physiological and pathological information more important . In this paper, the two sets of bio- impedance measurement system , System I and System II . System Ⅰ is based on the bioelectrical impedance measuring system of the quadrature demodulator by precision DDS chip AD9854 generated the orthogonal sine wave frequency signal to enter the human body through the current source circuit the current signal from the excitation electrode , the measuring electrode measured from the human body , the output voltage signal behind the multiplier demodulation , filter amplifier impedance signal . System Ⅱ is based impedance measurement SOC chip AD5933 small systems , ADI's latest highly integrated impedance measurement chip , part of the main function of the excitation signal source, such as bio - impedance measurements are integrated in the chip to a large extent reduced system size , simplify circuit design . The system can either select the host computer control interface for parameter control and display , can also be controlled via the LCD keypad module of the system itself independent measurement . System Ⅱ meridian impedance changes after the initial application in acupuncture research different line needle practices Experimental study on strong lift and thrust , hard twist , weak lift and thrust , of weak twisting four line pin practices of meridians the impedance of the impact of a preliminary study . The results showed that different line of needles practices meridian impedance to reduce , but the strength and duration of effect . In contrast , strong stimulation practices , the same to mention thrusting significant effect intensity . Experimental results there are large individual differences , the need to do further more a large number of samples .

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CLC: > Medicine, health > Chinese Medicine > Basic Theory of Traditional Chinese Medicine > Meridians, cavities > Meridian
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