Key result
An ECG signal acquisition system using multiple unipolar capacitively coupled electrodes mounted on a chair can reliably obtain ECG signals from clothed subjects.
Why the study?
Can ECG signals be reliably obtained from clothed subjects using multiple unipolar capacitively coupled electrodes mounted on a chair?
Can ECG signals be reliably obtained from clothed subjects using multiple unipolar capacitively coupled electrodes mounted on a chair?
A prototype chair-mounted ECG system using unipolar capacitively coupled electrodes can reliably acquire ECG signals from clothed subjects.
Answers are grounded in this paper and cite their sources.
Prototype shows feasibility of unipolar capacitive multi-electrode ECG; leaves open clinical validation and adoption.
A prototype of an electrocardiogram (ECG) signal acquisition system with multiple unipolar capacitively coupled electrodes is designed and experimentally tested. Capacitively coupled electrodes made of a standard printed circuit board (PCB) are used as the sensing electrodes. Different from the conventional measurement schematics, where one single lead ECG signal is acquired from a pair of sensing electrodes, the sensing electrodes in our approaches operate in a unipolar mode, i.e., the biopotential signals picked up by each sensing electrodes are amplified and sampled separately. Four unipolar electrodes are mounted on the backrest of a regular chair and therefore four channel of signals containing ECG information are sampled and processed. It is found that the qualities of ECG signal contained in the four channel are different from each other. In order to pick up the ECG signal, an index for quality evaluation, as well as for aggregation of multiple signals, is proposed based on phase space reconstruction. Experimental tests are carried out while subjects sitting on the chair and clothed. The results indicate that the ECG signals can be reliably obtained in such a unipolar way.
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Hou et al. (2018) studied this question. ECG signal acquisition system with multiple unipolar capacitively coupled electrodes was evaluated on Quality of ECG signal acquisition. An ECG signal acquisition system using multiple unipolar capacitively coupled electrodes mounted on a chair can reliably obtain ECG signals from clothed subjects.
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