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Optimum electrode configuration for detection of leg movement using bio-impedance

Authors
 Chul Gyu Song  ;  Soo Chan Kim  ;  Ki Chang Nam  ;  Deok Won Kim 
Citation
 PHYSIOLOGICAL MEASUREMENT, Vol.26(2) : S59-S68, 2005 
Journal Title
PHYSIOLOGICAL MEASUREMENT
ISSN
 0967-3334 
Issue Date
2005
MeSH
Adult ; Ankle Joint/physiology* ; Electric Impedance* ; Electrodes* ; Humans ; Knee Joint/physiology* ; Leg/physiology ; Male ; Movement/physiology* ; Physical Examination/instrumentation ; Physical Examination/methods ; Plethysmography, Impedance/instrumentation ; Plethysmography, Impedance/methods* ; Range of Motion, Articular/physiology* ; Reproducibility of Results ; Sensitivity and Specificity
Keywords
angular change ; impedance change ; leg movement ; optimum electrode configuration
Abstract
Impedances and joint angles were simultaneously measured during ankle and knee movements. The correlation coefficients of the joint angle and the impedance change from human leg movement were obtained using an electro-goniometer and a four-channel impedance measurement system. Because the impedance changes resulting from ankle and knee movements depended heavily on the electrode placement, we determined the optimum electrode configurations for those movements by searching for high correlation coefficients, large impedance changes and minimum interferences in ten subjects (age: 20 ± 4). Our optimum electrode configurations showed strong relationships between the ankle joint angle and lower leg impedance (correlation coefficient = −0.91 ± 0.06) and between the knee joint angle and knee impedance (correlation coefficient = 0.94 ± 0.04). The reproducibilities of the impedance changes of five subjects due to the ankle and knee were 6.3 ± 1.9% and 5.1 ± 1.7% for the optimum electrode pairs, respectively. We propose that this optimum electrode configuration would be useful for future studies involving the convenient measurement of leg movements by the impedance method.
Full Text
http://iopscience.iop.org/0967-3334/26/2/006/
DOI
10.1088/0967-3334/26/2/006
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Medical Engineering (의학공학교실) > 1. Journal Papers
Yonsei Authors
Kim, Deok Won(김덕원)
Nam, Ki Chang(남기창)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/147482
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