Development of wearable device measuring impedance to monitor respiration

Abstract

Respiration measurement provides us with the assessment of the autonomic nervous system (ANS) because of the interaction between respiratory system and ANS. Therefore, the purpose of this research was to develop wearable device measuring impedance to monitor respiration. Ten healthy subjects wore smart-wear and attached oronasal airflow. The oronasal airflow connected the conventional biopotential measurement device. In the experiment, each subject measured impedance for 1 minute during sitting. Also, they performed 2 respiration conditions (respiration rate (RR): 15 times/min and 30 times/min) to confirm whether the developed device can measure the variation of the respiration pattern. The RR was calculated by peak detection, and we compared that the signals measured by both devices. In both conditions, 8 out of 10 had the same RR on both devices. These results showed that the developed smart-wear can measure RR and respiration patterns.