System and method for robust pulse oximetry using image reconstruction
US12310726B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2021 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Oct 2, 2043 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7221
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A characteristic (e.g., SpO2) of a user's physiological signals can be estimated using a pulse oximeter. In some examples, inconsistent measurement of the physiological characteristic may occur despite the underlying physiological signals having quality characteristics consistent with physiologically valid signals showing a consistent cardiac signal indicative of accurate measurement of the physiological characteristic. In particular, the measurement inconsistency may be associated with a spatially localized region. Such measurement inconsistency may result in an incorrect, low estimate of the physiological characteristic relative to the true characteristic (e.g., the SpO2 estimate may skew lower than the true SpO2). An algorithm may be used to detect spatially localized measurement inconsistency and to mitigate or reduce its effect to improve the accuracy of the estimate of the physiological characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.