The study on extraction method of pulse rate variability in daily unsupervised state

• Published in: Sheng wu yi xue gong cheng xue za zhi Vol. 36; no. 2; p. 298
• Main Authors: Qi, Yusheng, Zhang, Aihua, Ma, Yurun
• Format: Journal Article
• Language: Chinese
• Published: China Sichuan Society for Biomedical Engineering 25.04.2019
• Subjects: Accuracy; Amplitudes; Bluetooth; Chewing; Data acquisition; Data processing; Ear; EKG; Electrocardiography; Electrocardiography, Ambulatory; Experiments; Fingers; Heart Rate; Humans; Monitoring, Ambulatory; Motion; Perfusion; Pulse; Pulse rate; Signal detection; Smartphones; Stability; Variability; post-ear pulse signal; pulse rate variability; movement; daily unsupervised state; blood perfusion
• ISSN: 1001-5515
• DOI: 10.7507/1001-5515.201804015

The extraction of pulse rate variability(PRV) in daily life is often affected by exercise and blood perfusion. Therefore, this paper proposes a method of detecting pulse signal and extracting PRV in post-ear, which could improve the accuracy and stability of PRV in daily life. First, the post-ear pulse signal detection system suitable for daily use was developed, which can transmit data to an Android phone by Bluetooth for daily PRV extraction. Then, according to the state of daily life, nine experiments were designed under the situation of static, motion, chewing, and talking states, respectively. Based on the results of these experiments, synchronous data acquisition of the single-lead electrocardiogram (ECG) signal and the pulse signal collected by the commercial pulse sensor on the finger were compared with the post-auricular pulse signal. According to the results of signal wave, amplitude and frequency-amplitude characteristic, the post-ear pulse signal was significantly steady and had more information t