System and method of a biosensor for detection of vasodilation
US10744261B2 · kind B2 · utility
2Cited by
87References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 26, 2018 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Oct 26, 2038 |
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 level of vasodilation or a period of vasodilation. The processing circuit may determine a circulation level using a phase offset between the PPG signals and/or a correlation value between the PPG signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.