Plethysmography heart rate monitor noise reduction using differential sensors
US10595785B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2015 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Dec 18, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/02433
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus includes a first electromagnetic sensor configured to generate a first sensed signal based at least in part on detection of a first signal having a first wavelength. The apparatus includes a second electromagnetic sensor configured to generate a second sensed signal based at least in part on detection of a second signal having a second wavelength different from the first wavelength. The apparatus includes a processing circuit configured to generate a plethysmogram based at least in part on the first sensed signal and the second sensed signal. The apparatus may include a first emitter configured to emit an optical signal having the first wavelength. The apparatus may include a second emitter configured to emit a reference signal. The first wavelength may be a human-blood-sensitive and human-skin-penetrable wavelength and the second wavelength may be at least one of a human-blood-insensitive wavelength and a human-skin-impenetrable wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.