System and method of a biosensor for detection of vasodilation
US11980741B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Aug 14, 2020 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Nov 23, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/63
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An optical circuit detects PPG signals reflected from skin tissue at one or more different wavelengths. A processing circuit integrated in the biosensor or in communication with the biosensor processes the PPG signals to obtain a period of vasodilation, a level of vasodilation and rate of change of the level of vasodilation. The processing circuit compares the level of vasodilation to a normal range and determines an arterial stiffness index using the comparison and the rate of change of the level of vasodilation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.