Method and apparatus for noninvasive prediction of hematocrit
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United States of America Patent
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May 26, 1998
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N/A
app pub date -
Sep 10, 1996
filing date -
Jan 31, 1994
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Expired
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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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