Apparatus for measuring hematocrit
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United States of America Patent
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Feb 18, 2003
Grant Date -
Jun 21, 2001
app pub date -
Dec 8, 2000
filing date -
Feb 8, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for use in respect of samples which are assessed for quality prior to testing in a clinical analyzer. The method and apparatus identify parameters such as gel level and height of fluid above the gel in blood samples, where appropriate, for the purposes of positioning the specimen for determination of interferents. Such interferents include hemoglobin (Hb), total bilirubin and lipids. These interferents are determined by measurement of absorption of different wavelengths of light in serum or plasma, or other speciments, which are then compared with values obtained through calibration using reference measurements for the respective interferents in serum or plasma or other type of specimen. Determination of temperature of the specimen, as well as specimen type, for example whether the specimen is urine or plasma or serum, may also be carried out.
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