System and method for health monitoring using a non-invasive, multi-band biosensor
US9642578B2 · kind B2 · utility
27Cited by
2References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2016 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Sep 24, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2560/0223
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A biosensor includes a PPG circuit that emits light directed at living tissue at a plurality of wavelengths. A first and second spectral response of light reflected from the tissue is obtained around a first wavelength and a second wavelength. Using absorption coefficients for substances at the plurality of wavelengths, concentration levels of a plurality of substances may then be determined from the spectral responses. This embodiment of the biosensor may thus be used to determine concentrations of a plurality of substances in arterial blood flow using the spectral response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.