指-耳心电图：基于耳塞的心脏监测方法的系统评估
Finger-to-Ear ECG: Systematic Evaluation of an Earbud-Based Cardiac Monitoring Approach
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- Karlsruhe Institute of Technology（卡尔斯鲁厄理工学院）
- IPAI Foundation gGmbH（IPAI基金会）
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中文总结 AI 辅助
本研究系统评估了耳塞式指-耳心电图范式，发现左手配置在R峰检测和形态保持上表现优异，但行走和右手配置导致信号退化，并揭示了信号保真度与用户舒适度之间的权衡。
中文摘要 AI 辅助
耳部心电图（Ear-ECG）能够实现无干扰的心脏监测，但现有方法常常面临信号幅度低和形态保持有限的问题。我们评估了一种指-耳心电图范式，该范式在配备扬声器的耳塞中结合了耳内电极和后壳手指接触电极。一项涉及30名参与者的研究考察了四种指-耳电极几何结构，并与胸部参考心电图进行比较，同时评估了在音乐播放、说话和行走干扰下的稳健性。左手配置的R峰检测F1分数>99%，且关键心电图形态特征具有高度一致性。相比之下，右手配置以及行走导致严重信号退化。结果揭示了一个权衡：虽然跨身体设置提供了最高信号保真度，但用户出于舒适原因偏好同侧接触。这确立了指-耳心电图作为一种稳健、形态感知的范式，用于耳戴设备中的机会性感知。
英文摘要
Ear-ECG enables unobtrusive cardiac monitoring, but existing approaches often struggle with low signal amplitudes and limited morphology preservation. We evaluate a finger-to-ear ECG paradigm that combines an in-ear electrode with a rear housing finger-contact electrode in a speaker-equipped earbud. A study with 30 participants investigated four finger-to-ear electrode geometries against chest-reference ECG and additionally assessed robustness under music playback, talking, and walking disturbances. Left-finger configurations achieved R peak detection F1-scores >99% with high agreement of key ECG morphology features. In contrast, right finger configurations as well as walking led to severe signal degradation. The results reveal a trade-off: while cross-body setups provided the highest signal fidelity, users preferred same-side contacts for comfort reasons. This establishes finger-to-ear ECG as a robust, morphology-aware paradigm for opportunistic sensing in earables.
