Validation of a Wireless Bluetooth Photoplethysmography Sensor Used on the Earlobe for Monitoring Heart Rate Variability Features during a Stress-Inducing Mental Task in Healthy Individuals
Validation of a Wireless Bluetooth Photoplethysmography Sensor Used on the Earlobe for Monitoring Heart Rate Variability Features during a Stress-Inducing Mental Task in Healthy Individuals
复制标题
DOI：
10.3390/s20143905
复制
发表时间：
2020-07-01
期刊：
影响因子：
3.9
通讯作者：
Pego, Jose Miguel
中科院分区：
文献类型：
--
作者：
Correia, Bruno;Dias, Nuno;Pego, Jose Miguel
使用心电图 (ECG) 的心率变异性 (HRV) 作为压力反应的生物标志物已广受欢迎。 HRV 监测的替代方案，如光电体积描记法 (PPG)，正在探索作为更便宜且不引人注目的非侵入性技术。我们报告了一种新型无线 PPG 传感器，该传感器经过测试可检测由精神压力任务引起的 HRV 变化，并确定其信号是否可以用作 HRV 分析的 ECG 替代品。数据是在志愿者休息和精神紧张的任务期间使用 PPG 和 ECG 传感器同时收集的。从这些信号中提取 HRV 指标并进行比较，以确定它们之间的一致性，并确定指标是否因压力任务而发生任何变化。对于这两项任务，平均心跳间隔、SDNN、LF 和 SD2 具有中等/良好的一致性，而 pNN50、RMSSD|SD1 和 HF 指标的一致性较差。从 PPG 信号中获得的大多数测试 HRV 指标均显示脑力任务导致的显着下降。特定 HRV 功能之间发现的分歧在比较不同技术的指标时需要谨慎。尽管如此，所测试的传感器成功地检测到由精神压力源引起的 HRV 变化。
Heart rate variability (HRV), using electrocardiography (ECG), has gained popularity as a biomarker of the stress response. Alternatives to HRV monitoring, like photoplethysmography (PPG), are being explored as cheaper and unobtrusive non-invasive technologies. We report a new wireless PPG sensor that was tested in detecting changes in HRV, elicited by a mentally stressful task, and to determine if its signal can be used as a surrogate of ECG for HRV analysis. Data were collected simultaneously from volunteers using a PPG and ECG sensor, during a resting and a mentally stressful task. HRV metrics were extracted from these signals and compared to determine the agreement between them and to determine if any changes occurred in the metrics due to the stressful task. For both tasks, a moderate/good agreement was found in the mean interbeat intervals, SDNN, LF, and SD2, and a poor agreement for the pNN50, RMSSD|SD1, and HF metrics. The majority of the tested HRV metrics obtained from the PPG signal showed a significant decrease caused by the mental task. The disagreement found between specific HRV features imposes caution when comparing metrics from different technologies. Nevertheless, the tested sensor was successful at detecting changes in the HRV caused by a mental stressor.