Pulse oximeter sensor with piece-wise function
US6801797B2 · kind B2 · utility
279Cited by
6References
8Claims
0Family size
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Key dates
| Filing date | Apr 16, 2001 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Apr 16, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/085
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A memory in a sensor is used to store multiple coefficients for a physiological parameter. In one embodiment, not only are the sensor's specific calibration coefficients stored in a memory in the sensor for the formula to determine oxygen saturation, but multiple sets of coefficients are stored. The multiple sets apply to different ranges of saturation values to provide a better fit to occur by breaking the R to SpO2 relationship up into different pieces, each described by a different function. The different functions can also be according to different formulas for determining oxygen saturation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.