Active-pulse blood analysis system
US9724025B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2014 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Jul 10, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/721
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An active-pulse blood analysis system has an optical sensor that illuminates a tissue site with multiple wavelengths of optical radiation and outputs sensor signals responsive to the optical radiation after attenuation by pulsatile blood flow within the tissue site. A monitor communicates with the sensor signals and is responsive to arterial pulses within a first bandwidth and active pulses within a second bandwidth so as to generate arterial pulse ratios and active pulse ratios according to the wavelengths. An arterial calibration curve relates the arterial pulse ratios to a first arterial oxygen saturation value and an active pulse calibration curve relates the active pulse ratios to a second arterial oxygen saturation value. Decision logic outputs one of the first and second arterial oxygen saturation values based upon perfusion and signal quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.