A wearable, flexible sensor for real-time, home monitoring of sleep apnea
Satoko Honda,
Hyuga Hara,
Takayuki Arie,
Seiji Akita,
Kuniharu Takei
Affiliations
Satoko Honda
Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; Department of Physics and Electronics, Osaka Metropolitan University, Sakai, Osaka 599-8531, Japan
Hyuga Hara
Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; Department of Physics and Electronics, Osaka Metropolitan University, Sakai, Osaka 599-8531, Japan
Takayuki Arie
Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; Department of Physics and Electronics, Osaka Metropolitan University, Sakai, Osaka 599-8531, Japan
Seiji Akita
Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; Department of Physics and Electronics, Osaka Metropolitan University, Sakai, Osaka 599-8531, Japan
Kuniharu Takei
Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; Department of Physics and Electronics, Osaka Metropolitan University, Sakai, Osaka 599-8531, Japan; Corresponding author or
Summary: A flexible sensor that can be attached to the body to collect vital data wirelessly enables real-time human healthcare management. One potential application for home-use healthcare devices is monitoring of sleep conditions to diagnose sleep apnea syndrome. Such data are not readily gathered using conventional tools, owing to the bulk and cost of instrumentation. In order to monitor respiration at home, it is necessary to improve sensing performance and long-term stability of the sensors without sacrificing wearability and comfortability. To build a platform for wireless home-use respiration monitoring, this study develops a mask-borne flexible humidity sensor using ZnIn2S4 nanosheets as a humidity-sensitive material with high sensitivity and stability for more than 150 h. As proof-of-concept, long-term wireless respiration monitoring is demonstrated during sleep to identify symptoms of sleep apnea in wearers.
