Systems and methods for determining blood oxygen saturation values using complex number encoding
US6970792B1 · kind B1 · utility
1,047Cited by
80References
17Claims
0Family size
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Key dates
| Filing date | Dec 3, 2003 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Jan 4, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7239
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The disclosure includes pulse oximetry systems and methods for determining point-by-point saturation values by encoding photoplethysmographs in the complex domain and processing the complex signals. The systems filter motion artifacts and other noise using a variety of techniques, including statistical analysis such as correlation, or phase filtering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.