Home-use, wearable healthcare devices may enable patients to collect various types of medical data during daily activities. Electrocardiographic data are vitally important. To be practical, monitoring devices must be wearable, comfortable, and stable, even during exercise. This study develops a breathable, stretchable sensor sheet by employing a kirigami structure, and we examine the size dependence of electrocardiographic sensors. Because the kirigami film has many holes, sweat readily passes through the sensor from the skin to the environment. For comfort, in addition to breathability, electrocardiographic sensor size is minimized. The limitation of the size is studied in relation to the signal-to-noise ratio of electrocardiographic signals, even under exercise. We found that the optimal size of the sensor is ∼200 mm2 and the distance between electrodes is 1.5 cm. Finally, long-term wireless electrocardiographic monitoring is demonstrated using data transmission to a smart phone app during different activities.

中文翻译：

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无线、最小化、可拉伸和透气的心电图传感器系统

家用可穿戴医疗保健设备可以让患者在日常活动中收集各种类型的医疗数据。心电图数据至关重要。为了实用，监测设备必须可穿戴、舒适且稳定，即使在运动期间也是如此。本研究采用剪纸结构开发了一种透气、可拉伸的传感器片，并研究了心电图传感器的尺寸依赖性。由于剪纸薄膜有很多孔，汗水很容易通过传感器从皮肤传播到环境中。为了舒适，除了透气性，心电图传感器的尺寸也被最小化。研究了与心电图信号的信噪比相关的大小限制，即使在运动时也是如此。我们发现传感器的最佳尺寸为 ∼200 mm2个电极之间的距离为1.5cm。最后，演示了在不同活动期间使用数据传输到智能手机应用程序的长期无线心电图监测。