Validation of wearable textile electrodes for ECG monitoring

Figures

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  Fig. 1. Wearable ECG of smart garment. The ECG sensor patches (5) were placed inside the undershirt (“1. 2.” outside and inside faces for men or the bra strap “3.4.” for women). (6) Cross-sectional view of the textile electrode (hitoe®). The cloth of polyester nanofiber (8) was coated by electroconductive polymer PEDOT-PSS (7, blue circles), which surface was directly placed on the skin (9). Back side of the electroconductive textile was fixed on the waterproof layer (12) and the cloth of the underwear (12). ECG signals were conducted through the textile electrodes (5. 10. 11) to electro-conductive yarn (15) and a snap hook button (14); then, these ECG electrodes and the lead wire were connected to the ECG transmitter (13)

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  Fig. 2. Signal voltage (QRS voltage)-to-artifact voltage ratio (SAR). The ratio of the QRS voltage to a baseline shift was quantified and termed the signal voltage (QRS voltage)-to-artifact voltage ratio or the extent of the drift level of the isoelectric line (SAR). In the present study, the SAR was calculated using a modification of Meziane’s method conditions

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  Fig. 3. Washing durability of the textile electrodes

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  Fig. 4. Representative tracings of the textile and conventional gel electrodes

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  Fig. 5. Comparison of waveform recognition between the gel-type conventional electrode and the textile electrode at rest and during postural changes. a All volunteer subjects (n = 66). b Males (n = 47). c Females (n = 19)