A system for noninvasively measuring blood alcohol concentration using light includes one or more emitters each configured to emit light in the near infrared or infrared light spectrum at one or more wavelengths that respond to varied chromophore concentrations of ethanol and water in blood of a human subject. One or more detectors is configured to detect light emitted at the one or more wavelengths and output a representation of a photoplethysmography (PPG) waveform for one or more of the one or more wavelengths. A processing subsystem is coupled to the one or more emitters and the one or more detectors. The processing subsystem is configured to determine a measure of an amplitude of the representation of the PPG waveform for each of the one or more wavelengths and determine the blood alcohol concentration by referencing the measured amplitude for each of the one or more wavelengths to a molar absorptivity plot which indicates a measure of the absorption or scattering at alcohol and water solutions ranging between a solution of 100% alcohol and a solution of 100% water.
SYSTEM AND METHOD FOR NONINVASIVELY MEASURING BLOOD ALCOHOL CONCENTRATION USING LIGHT
SYSTEM UND VERFAHREN ZUR NICHTINVASIVEN MESSUNG DER BLUTALKOHOLKONZENTRATION MITTELS LICHT
SYSTÈME ET PROCÉDÉ DE MESURE NON INVASIVE DU TAUX D'ALCOOLÉMIE À L'AIDE DE LUMIÈRE
2022-12-28
Patent
Electronic Resource
English
IPC: | A61B DIAGNOSIS , Diagnostik / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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