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

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Abstract

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.

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

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Publication details

The article was received on 12 Sep 2019, accepted on 20 Nov 2019 and first published on 04 Dec 2019


Article type: Paper
DOI: 10.1039/C9LC00911F
Lab Chip, 2020, Advance Article

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

    F. J. Zhao, M. Bonmarin, Z. C. Chen, M. Larson, D. Fay, D. Runnoe and J. Heikenfeld, Lab Chip, 2020, Advance Article , DOI: 10.1039/C9LC00911F

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