Signal-Quality Indices for the Electrocardiogram and Photoplethysmogram: Derivation and Applications to Wireless Monitoring
Signal-Quality Indices for the Electrocardiogram and Photoplethysmogram: Derivation and Applications to Wireless Monitoring
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DOI：
10.1109/jbhi.2014.2338351
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发表时间：
2015-05-01
影响因子：
7.7
通讯作者：
Tarassenko, Lionel
中科院分区：
文献类型：
--
作者：
Orphanidou, Christina;Bonnici, Timothy;Tarassenko, Lionel
使用可穿戴传感器获得的记录中的无效数据的识别是特别重要的，因为从移动的患者获得的数据通常比从非移动的患者获得的数据噪声更大。在本文中，我们提出了一个信号质量指数（SQI），旨在评估是否可以从使用可穿戴传感器收集的心电图（ECG）和光电容积描记图（PPG）信号中获得可靠的心率（HR）。人工标记的数据上的算法进行了验证。ECG的敏感性和特异性分别为94%和97%，PPG为91%和95%。此外，我们提出了两个应用程序的SQI。首先，我们证明，通过使用SQI作为触发器的节能策略，它是可能的，以减少记录时间高达94%的心电图和93%的PPG只有最小的损失有效的生命体征数据。其次，我们演示了如何使用SQI来减少PPG中呼吸率（RR）估计的误差。这两个应用程序的性能进行了评估，从临床研究中收集的数据，医院的病人谁能够步行无辅助。
The identification of invalid data in recordings obtained using wearable sensors is of particular importance since data obtained from mobile patients is, in general, noisier than data obtained from nonmobile patients. In this paper, we present a signal quality index (SQI), which is intended to assess whether reliable heart rates (HRs) can be obtained from electrocardiogram (ECG) and photoplethysmogram (PPG) signals collected using wearable sensors. The algorithms were validated on manually labeled data. Sensitivities and specificities of 94% and 97% were achieved for the ECG and 91% and 95% for the PPG. Additionally, we propose two applications of the SQI. First, we demonstrate that, by using the SQI as a trigger for a power-saving strategy, it is possible to reduce the recording time by up to 94% for the ECG and 93% for the PPG with only minimal loss of valid vital-sign data. Second, we demonstrate how an SQI can be used to reduce the error in the estimation of respiratory rate (RR) from the PPG. The performance of the two applications was assessed on data collected from a clinical study on hospital patients who were able to walk unassisted.