open access

https://hdl.handle.net/2115/92972

Wireless, Flexible, Ionic, Perspiration‐Rate Sensor System with Long‐Time and High Sweat Volume Functions Toward Early‐Stage, Real‐Time Detection of Dehydration

wireless systems

2023-10-25

John Wiley & Sons

Advanced Functional Materials

33(44)

2306516

Flexible sensors that can be attached to the body to collect vital data wirelessly enable real-time, early-stage diagnosis for human health management. Wearable sweat sensors have received considerable attention for real-time physiological monitoring. Unlike conventional methods that require blood-drawing in a clinic, sweat analyses may enable non-invasive tracking of health conditions for early-stage diagnosis. Even though a variety of studies to monitor metabolites and other substances have been conducted, automatic, continuous, long-term, simultaneous monitoring of perspiration rate and electrolytes, which are important parameters in dehydration, has yet to be achieved because of challenges related to sensor design. Here we present a wireless, wearable, integrated, microfluidic sensor system that can continuously measure these parameters in real-time for prolonged periods. The proposed sensors are systematically characterized, and machine learning is used to predict device tilt angle to calibrate sensor output signals. Using the sensor design to form a water droplet in a fluidic channel, high-volume perspiration rate is continuously monitored for more than 7000 s (total sweat volume >170 μL). By testing 10 subjects, physiological responses to ingestion of a sports drink were confirmed by measuring perspiration rhythm changes extracted from real-time, continuous sweat impedance and rate.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: Honda, S., Tanaka, R., Matsumura, G., Seimiya, N., Takei, K., Wireless, Flexible, Ionic, Perspiration-Rate Sensor System with Long-Time and High Sweat Volume Functions Toward Early-Stage, Real-Time Detection of Dehydration. Adv. Funct. Mater. 2023, 33, 2306516, which has been published in final form at https://doi.org/10.1002/adfm.202306516. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

1616-301X

1616-3028