Method and apparatus for noninvasive prediction of hematocrit
US5755226A · kind A · utility
243Cited by
33References
11Claims
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Key dates
| Filing date | Sep 10, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Sep 10, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/905
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for the direct noninvasive prediction of hematocrit in mammalian blood using photoplethysmography techniques and data processing. The method and apparatus also include optional prediction of other analytes of interest: percent oxygen saturation of mammalian blood and methemoglobin of stored blood. The method and apparatus can be used for the immediate, periodic, or continuous noninvasive diagnosis or monitoring of hematocrit levels in mammalian patients without pain to the patient or exposure of the health care practitioner to the blood of the patient.
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