Discerning between the presence of red blood cells and free hemoglobin in a biological fluid
US10890524B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2019 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Jun 3, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/062
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensor device includes a light source configured to emit a light including a wavelength in a range of 650 to 900 nm that is exposed to a biological fluid at first and second times. At least a portion of the light is reflected off of the fluid and received by a light detector. The light detector analyzes at least a portion of the received light to determine a first intensity of the light at the wavelength at the first time and a second intensity of the light at the wavelength at the second time. A controller compares the first and second intensities and generates an output indicative of the presence of red blood cells or free hemoglobin in the biological fluid depending on which intensity is greater and whether there is more redness in the biological fluid at the first time or at the second time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.