Optimal electrode array for ambulatory measuring of cardiac output based on the electrical impedance method / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 32-57, 2011.
Article
in Chinese
| WPRIM
| ID: wpr-260854
ABSTRACT
Principle of ambulatory cardiac output (CO) measuring technique is introduced in this paper. A lot of experimental studies of the current distribution on the thorax under the condition that the current injection electrodes were adhered to different positions were carried out by using a developed multi-channel impedance mapping system. The static impedance contour maps (Zo-map) and its pulsatile component contour maps (deltaZ-map) under different measuring conditions were analyzed, and the applicability of a two-compartment coaxial cylindrical model using a spot-electrode array instead of the conventional band-electrode array for ambulatory CO measurement, as well as the optimal spot-electrode array, were discussed. Based on the experimental results and the daily use of the ambulatory CO measuring technique, the optimal spot-electrode array meeting the condition of the two-compartment coaxial cylindrical model was determined as that a pair of spot-electrodes for current injection was located on the positions behind the ears and on the right lower abdomen, and a pair of spot-electrodes for voltage pick-up places on the medial portion at the level of clavicle and on the portion above the xiphisternum.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Physiology
/
Cardiac Output
/
Cardiography, Impedance
/
Electric Impedance
/
Electrodes
/
Equipment Design
/
Methods
Limits:
Humans
Language:
Chinese
Journal:
Journal of Biomedical Engineering
Year:
2011
Type:
Article
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