Multi-wavelength oximeter having a means for disregarding a poor signal
US4714341A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1985 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Feb 21, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/1241
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An oximeter for measuring oxygen saturation in arterial blood includes a light source for projecting light to a body member to be measured, a light responsive circuit for receiving the light which has transmitted through said body member and for generating at least first, second and third signals at three different wavelengths, and a calculator for calculating at least first SaO.sub.2 data using first and second signals and second SaO.sub.2 data using first and third signals. It is detected whether or not a difference between the first and second SaO.sub.2 data is within a predetermined level. When the difference is within the predetermined level, it is assumed that the first and/or second SaO.sub.2 data are valid, but if not, they are assumed as invalid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.