TY - JOUR
T1 - A portable bio-impedance system for monitoring lung resistivity
AU - Zlochiver, S.
AU - Arad, M.
AU - Radai, M. M.
AU - Barak-Shinar, D.
AU - Krief, H.
AU - Engelman, T.
AU - Ben-Yehuda, R.
AU - Adunsky, A.
AU - Abboud, S.
PY - 2007/1
Y1 - 2007/1
N2 - The principles of a hybrid bio-impedance technique are implemented in a novel, lung resistivity monitoring system ("CardioInspect" Tel-Aviv University, Israel). The system is to be utilized in the clinic or at home, for daily monitoring of patients suffering from pulmonary edema. The developed system consists of an eight-electrode belt worn around the thorax, an electronic unit containing analog and digital boards, and a stand-alone DSP based system with a designated software to analyze the data. A Newton-Raphson algorithm based on the finite-volume method is employed for the optimization of the left and right lung resistivity values, making use of the voltage measurements retrieved from opposite current injections. In this preliminary study, 33 healthy volunteers were measured with the system during tidal respiration, yielding symmetric mean left and right lung resistivity values of (1205 ± 163, 1200 ± 165) (Ω cm). The system reproducibility was better than 2% for both within and between tests measurements, and no dependency between the reconstructed values and various anthropometric parameters was found.
AB - The principles of a hybrid bio-impedance technique are implemented in a novel, lung resistivity monitoring system ("CardioInspect" Tel-Aviv University, Israel). The system is to be utilized in the clinic or at home, for daily monitoring of patients suffering from pulmonary edema. The developed system consists of an eight-electrode belt worn around the thorax, an electronic unit containing analog and digital boards, and a stand-alone DSP based system with a designated software to analyze the data. A Newton-Raphson algorithm based on the finite-volume method is employed for the optimization of the left and right lung resistivity values, making use of the voltage measurements retrieved from opposite current injections. In this preliminary study, 33 healthy volunteers were measured with the system during tidal respiration, yielding symmetric mean left and right lung resistivity values of (1205 ± 163, 1200 ± 165) (Ω cm). The system reproducibility was better than 2% for both within and between tests measurements, and no dependency between the reconstructed values and various anthropometric parameters was found.
KW - ECG analysis
KW - EIT
KW - Finite-volume method
KW - Parameterized Newton-Raphson
UR - http://www.scopus.com/inward/record.url?scp=33750477665&partnerID=8YFLogxK
U2 - 10.1016/j.medengphy.2006.02.005
DO - 10.1016/j.medengphy.2006.02.005
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AN - SCOPUS:33750477665
SN - 1350-4533
VL - 29
SP - 93
EP - 100
JO - Medical Engineering and Physics
JF - Medical Engineering and Physics
IS - 1
ER -