Key result
The capacitively coupled ECG measurement system integrated into an office chair successfully obtained an ECG without direct skin contact, showing good correlation with classical conductive ECG.
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A non-contact, capacitively coupled ECG system integrated into a chair can obtain readable ECG signals through clothing, though it is sensitive to movement and clothing thickness.
This publication describes a measurement system that obtains an electrocardiogram (ECG) by capacitively coupled electrodes. Fordemonstration purposes, this measurement system was integrated into an off-the-shelf office chair (so-called “Aachen SmartChair”).Whereas in usual clinical applications adhesive, conductively-coupled electrodes have to be attached to the skin, the described system is able to measure an ECG without direct skin contact through the cloth. A wireless communication module was integrated for transmitting theECG data to a PC or to an ICU patient monitor. For system validation, a classical ECG with conductive electrodes and an oxygensaturation signal (SpO2) were obtained simultaneously. Finally, system-specific problems of the presented device are discussed.
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Aleksandrowicz et al. (2007) studied Healthy (n=1). Capacitively coupled ECG measurement system (Aachen SmartChair) vs. Classical conductive Einthoven ECG was evaluated on ECG signal quality and vital signal correlation. The capacitively coupled ECG measurement system integrated into an office chair successfully obtained an ECG without direct skin contact, showing good correlation with classical conductive ECG.
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