Ultra-simple wearable local sweat volume monitoring patch based on swellable hydrogels

Quantifiably monitoring sweat rate and volume is important to assess the stress level of individuals and/or prevent dehydration, but despite intense research, a convenient, continuous, and low-cost method to monitor sweat rate and total sweat volume loss remains an un-met need. We present here an ul...

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Bibliographic Details
Published in:Lab on a chip 2020-01, Vol.2 (1), p.168-174
Main Authors: Zhao, F. J, Bonmarin, M, Chen, Z. C, Larson, M, Fay, D, Runnoe, D, Heikenfeld, J
Format: Article
Language:English
Subjects:
Biomedical materials
Dehydration
Hydrogels
Hydrogels - analysis
Hydrogels - economics
In vivo methods and tests
Low cost
Monitoring
Organic chemistry
Particle Size
Summer
Sweat
Wearable Electronic Devices - economics
Wearable technology
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Summary:Quantifiably monitoring sweat rate and volume is important to assess the stress level of individuals and/or prevent dehydration, but despite intense research, a convenient, continuous, and low-cost method to monitor sweat rate and total sweat volume loss remains an un-met need. We present here an ultra-simple wearable sensor capable of measuring sweat rate and volume accurately. The device continuously monitors sweat rate by wicking the produced sweat into hydrogels that measurably swell in their physical geometry. The device has been designed as a simple to fabricate, low-cost, disposable patch. This patch exhibits stable and predictable operation over the maximum variable chemistry expected for sweat (pH 4-9 and salinity 0-100 mM NaCl). Preliminary in vivo testing of the patch has been achieved during aerobic exercise, and the sweat rates measured via the patch accurately follow actual sweat rates. Presented is an ultra-simple wearable local sweat volume monitoring patch based on swellable hydrogels.
ISSN:1473-0197
1473-0189
DOI:10.1039/c9lc00911f