Non-invasive determination of a physiological state of interest in a subject
US11918352B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2019 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Jun 23, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/14546
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for non-invasively determining a physiological state of interest in a subject is described. The method involves, placing a body part in contact with a receptor, and directing a source of electromagnetic radiation (EMR) over a range of wavelengths onto body part so that the EMR reaches the blood and interstitial fluid within the body part. The EMR that is absorbed by, reflected by, or transmitted through, the blood and interstitial fluid of the body part is measured, and a spectrum over the range of wavelengths obtained. The spectrum is analyzed to determine an amount of two or more than two analytes within the blood and interstitial fluid of the body part and a biochemical profile is derived. The biochemical profile is used to determine the physiological state of interest in the subject. The physiological state of interest in the subject may be selected from the group of intoxication arising from cannabis, alcohol, a combination of cannabis and alcohol, opiates, fentanyl, amphetamines, phencyclidine, sedatives, anxyolytics, cocaine, caffeine, and nicotine consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.