Department of Electronic Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan.
Department of Photonics and Communication Engineering, Asia University, Taichung 41354, Taiwan.
Sensors (Basel). 2020 May 1;20(9):2577. doi: 10.3390/s20092577.
For years, capacitive electrocardiogram (CECG) has been known to be susceptible to ambient interference. In light of this, a novel capacitive electrode was developed as an effective way to reduce the interference effect. This was done by simply introducing the capacitive elector in series with a 1 pF capacitor, and the 60 Hz common mode noise induced by AC power lines was cancelled using a capacitive right leg (CRL) circuit. The proposed electrode did as expected outperform two counterparts in terms of SNR, and particularly gave an up to 99.8% correlation between RRIs extracted from an ECG and a CECG signal, a figure far beyond 52% and 63% using the two counterparts. This capacitive electrode was originally designed for long-term noncontact monitoring of heart rate, and hopefully can be integrated to portable devices for other medical care services in the near future.
多年来，电容式心电图 (CECG) 一直容易受到环境干扰。有鉴于此，开发了一种新型电容电极，作为减少干扰影响的有效方法。这是通过简单地将电容电极与 1 pF 电容器串联来实现的，并且使用电容右腿 (CRL) 电路消除了由交流电源线引起的 60 Hz 共模噪声。所提出的电极在 SNR 方面表现出色，与两个对照电极相比，特别是从心电图和 CECG 信号中提取的 RRIs 之间的相关性高达 99.8%，而使用两个对照电极的相关性分别仅为 52%和 63%。该电容电极最初是为长期非接触式心率监测而设计的，有望在不久的将来集成到便携式设备中，为其他医疗保健服务提供便利。
