Apparatus and method for determining oxygen saturation levels with increased accuracy
US4623248A · kind A · utility
96Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1983 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Feb 16, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/3181
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A catheter oximeter includes a fiber optic catheter for supplying radiation to blood under test at a plurality of wavelengths and detecting the intensities of the radiation back-scattered from the blood at each of the wavelengths. The oxygen saturation level of the blood is then computed by deriving it with a formula which uses the ratio of one pair of intensity signals when the oxygen saturation level is relatively low and with a formula which uses the ratio of another pair of intensity signals when the oxygen saturation level relatively is high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.