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

• DOI: 10.1039/c9lc00911f
• Publication Date: 2019-12-04T09:03:34Z
• Authors: F. J. Zhao; M. Bonmarin; Z. C. Chen; M. Larson; D. Fay; D. Runnoe; J. Heikenfeld
• Keywords: Wearable Technology

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, low-cost method monitor total loss remains an un-met need. We present here ultra-simple wearable sensor capable measuring accurately. The device continuously monitors by wicking produced into hydrogels that measurably swell in their physical geometry. has been designed as simple fabricate, low-cost, disposable patch. This patch exhibits stable predictable operation over maximum variable chemistry expected for (pH 4-9 salinity 0-100 mM NaCl). Preliminary vivo testing achieved during aerobic exercise, rates measured via accurately follow actual rates.