Cross-cut: `sensor-sweat-rate`

Axis: sensors

2 corpus entries disclose this tag.

Earliest disclosure: 1965-08-01

Listed in chronological order. Each entry’s prior_art_notes and disclosure_citation constitute the citeable prior art material.

Dune ‘stillsuit’ (body-moisture reclamation garment) (1965-08-01)

id: dune-stillsuit
corpus: fictional
form factor: garment
creator: Frank Herbert
disclosure: Herbert, Frank. Dune. Chilton Books, 1965 — a full-body garment with layered reclamation membranes that capture perspiration, respiration moisture, and other body fluids, filter and recycle the water, and monitor fit and function so the wearer can survive desert exposure.
ip status: fictional
sensors: sensor-microfluidic-sweat-collection, sensor-sweat-rate
algorithms: algo-hydration-status
prior art notes: Discloses a body-conforming garment with integrated microfluidic channels that collect and process perspiration (and other body fluids) from the skin surface, with monitoring of collection rate, fit, and the wearer’s hydration state. Directly relevant to sweat-collecting / sweat-analysis wearable claims combining ‘a skin-contacting garment or patch’, ‘microfluidic channels to collect perspiration’, and ‘a determination of hydration or fluid balance’. § 103 motivation that the sweat-collecting body garment with hydration monitoring was an articulated objective by 1965 — decades before the epidermal-microfluidics patent wave. Non-enabling on the membrane chemistry; pair with enabling microfluidic-sweat-sensor art.

id: koh-rogers-2016-soft-microfluidic-sweat-device
corpus: academic
form factor: patch
creator: Ahyeon Koh et al. / John A. Rogers group (Northwestern)
disclosure: Koh A, Kang D, Xue Y, Lee S, Pielak RM, Kim J, et al. (Rogers JA). ‘A soft, wearable microfluidic device for the capture, storage, and colorimetric sensing of sweat.’ Science Translational Medicine 2016;8(366):366ra165.
ip status: public-domain
sensors: sensor-microfluidic-sweat-collection, sensor-sweat-rate, sensor-ph, sensor-lactate, sensor-electrolyte, sensor-glucose-cgm
algorithms: algo-hydration-status, algo-electrolyte-trend
prior art notes: Discloses a soft, skin-mounted microfluidic ‘sticker’ that wicks sweat from the skin into a network of microchannels and reservoirs, measures sweat rate and total sweat loss, and performs colorimetric assays (pH, chloride, lactate, glucose) read out by eye or smartphone camera. Any wearable claim reciting ‘a skin-mounted patch with microfluidic channels collecting perspiration’ combined with ‘rate measurement’ and/or ‘colorimetric or electrochemical analysis of constituents’ reads on Koh/Rogers 2016. Anchor for the patch × microfluidic-sweat-collection cross-cut on the real side; [[dune-stillsuit]] (1965) is the fictional antecedent.