Optical analyzer for measuring a construction ratio between components in the living tissue
US4446871A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1980 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | Dec 15, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1459
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical analyzer such as oximeter is provided including a source of light having a plurality of different wavelengths. At least two or more of the different wavelengths have a fixed relationship of light absorption after coaction with hemoglobin oxide. The light is directed at the subject tissue and received after coaction by an optical probe. A first signal representative of the degree of light absorption at a predetermined standard wavelength is determined and then an attempt is made to match a second wavelength having a fixed relationship of light absorption to the predetermined standard wavelength, e.g., equal absorption, to generate a second signal representative of the second wavelength, whereby the amount of hemoglobin oxide can be determined in the bloodstream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.