Cross-cut: `algo-electrolyte-trend`

Axis: algorithms

3 corpus entries disclose this tag.

Earliest disclosure: 2014-07

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

Bandodkar & Wang (2014) — ‘Non-invasive wearable electrochemical sensors: a review’ (2014-07)

id: bandodkar-wang-2014-wearable-electrochemical-sensors-review
corpus: academic
form factor: other
creator: Amay J. Bandodkar / Joseph Wang (UC San Diego)
disclosure: Bandodkar AJ, Wang J. ‘Non-invasive wearable electrochemical sensors: a review.’ Trends in Biotechnology 2014;32(7):363-371.
ip status: public-domain
sensors: sensor-lactate, sensor-electrolyte, sensor-ph, sensor-glucose-cgm, sensor-alcohol-transdermal, sensor-uric-acid, sensor-cortisol
algorithms: algo-electrolyte-trend, algo-hydration-status
prior art notes: Surveys, as of 2014, wearable non-invasive electrochemical biosensors across body fluids and form factors — temporary-tattoo electrodes on the skin (sweat lactate, Na+, ammonium, pH), textile-integrated sensors, mouthguard (saliva) sensors, contact-lens (tear glucose) sensors, and the transdermal/interstitial route — including the sampling, transduction, and on-body electronics issues. Prior art for wearable-electrochemical-sensing claims reciting any of the analyte/form-factor combinations collected here; the approaches were published by 2014. General anchor for the electrochemical wearable cross-cuts.

id: gao-javey-2016-wearable-sweat-sensor-array
corpus: academic
form factor: headband
creator: Wei Gao et al. / Ali Javey group (UC Berkeley)
disclosure: Gao W, Emaminejad S, Nyein HYY, Challa S, Chen K, Peck A, et al. (Javey A). ‘Fully integrated wearable sensor arrays for multiplexed in situ perspiration analysis.’ Nature 2016;529(7587):509-514.
ip status: public-domain
sensors: sensor-lactate, sensor-glucose-cgm, sensor-electrolyte, sensor-ph, sensor-skin-temperature, sensor-microfluidic-sweat-collection
algorithms: algo-electrolyte-trend, algo-hydration-status
prior art notes: Discloses a fully integrated wearable (wristband / headband) with an array of electrochemical sensors measuring multiple sweat analytes simultaneously (glucose, lactate, Na+, K+) plus skin temperature for real-time signal compensation, with on-board signal conditioning, microcontroller, and wireless transmission to a phone — i.e. a complete in-situ sweat biochemistry monitor. Any wearable claim reciting ‘a band-form device with an array of two or more electrochemical sweat-analyte sensors plus a temperature sensor for compensation, with integrated electronics and wireless output’ reads on Gao/Javey 2016. Anchor for the sweat-electrochemical-sensing cross-cuts on the real side; [[bandodkar-wang-2014-wearable-electrochemical-sensors-review]] is the contemporaneous review.

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.