NDLI: A new proposal of optimal spot-electrode array for electrical impedance cardiography through the measurement of thoracic impedance mapping

Content Provider	IEEE Xplore Digital Library
Author	Yamakoshi, K. Nogawa, M. Tanaka, S. Ikarashi, A. Sasaki, K. Moroe, T. Maruyama, M. Takada, S.
Copyright Year	2003
Description	Author affiliation: Fac. of Eng., Kanazawa Univ., Japan (Yamakoshi, K.; Nogawa, M.; Tanaka, S.)
Abstract	An optimal spot-electrode array for electrical impedance or admittance cardiography to estimate stroke volume(SV) was determined based on the measurement of contour maps of static(Z/sub 0/) and pulsatile components(/spl Delta/Z) of the thoracic impedance using a 32/spl times/2 channels impedance mapping system. Taking a necessary condition of two-compartment coaxial cylinder model of the thorax to calculate SV into consideration, i.e., uniformity of Z/sub 0/-map and /spl Delta/Z-maps during cardiac blood ejection cycle, a pair of spot-electrodes for current injection should be located as far from the thorax as possible, such as on the forehead and on the left medial knee, while those for voltage pick-up would be appropriate to place on the medial portion at the level of clavicle and on the portion above the xiphisternum, where the /spl Delta/Z waves due to pulmonary circulation as well as blood ejection contracted by the heart showed little. Comparison experiments between the impedance and an indicator dilution method were also made to evaluate this newly determined spot-electrode array.
Sponsorship	Whitaker Found
Starting Page	3106
Ending Page	3108
File Size	279312
Page Count	3
File Format	PDF
ISBN	0780377893
ISSN	1094687X
DOI	10.1109/IEMBS.2003.1280799
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-17
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Proposals Cardiography Impedance measurement Electric variables measurement Thorax Blood Admittance measurement Volume measurement Coaxial components Forehead
Content Type	Text
Resource Type	Article

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