Wearable cardiorespiratory monitoring with stretchable elastomer optical fiber

Bingjie Zha; Zhuo Wang; Linqing Li; Xuehao Hu; Beatriz Ortega; Xiaoli Li; Rui Min

doi:10.1364/BOE.490034

Wearable cardiorespiratory monitoring with stretchable elastomer optical fiber

Biomed Opt Express. 2023 Apr 24;14(5):2260-2275. doi: 10.1364/BOE.490034. eCollection 2023 May 1.

Authors

Bingjie Zha¹, Zhuo Wang¹, Linqing Li¹, Xuehao Hu², Beatriz Ortega³, Xiaoli Li¹, Rui Min¹

Affiliations

¹ Center for Cognition and Neuroergonomics, State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Zhuhai 519087, China.
² Department of Electromagnetism and Telecommunication, University of Mons, Boulevard Dolez 31, 7000 Mons, Belgium.
³ ITEAM Research Institute, Universitat Politécnica de Valéncia, 46022 Valencia, Spain.

Abstract

This work presents a stretchable elastomer optical fiber sensor incorporated into a belt for respiratory rate (RR) and heart rate (HR) monitoring. Different materials and shapes of prototypes designed were tested in terms of performance and the best choice was identified. The optimal sensor was tested by 10 volunteers to evaluate the performance. The proposed elastomer optical fiber sensor can achieve simultaneous measurement of RR and HR in different body positions, and also ballistocardiography (BCG) signal measurement in the lying position. The sensor has good accuracy and stability, with maximum errors of 1 bpm and 3 bpm for RR and HR, respectively, and average weighted mean absolute percentage error (MAPE) of 5.25% and root mean square error (RMSE) of 1.28 bpm. Moreover, the results of the Bland-Altman method showed good agreement of the sensor with manual counting of RR and with electrocardiogram (ECG) measurements of HR.