Analytical method and apparatus for blood using near infrared spectroscopy
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United States of America Patent
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Sep 14, 2004
Grant Date -
Jun 6, 2002
app pub date -
Mar 16, 2001
filing date -
Oct 17, 2000
priority date (Note) -
Expired
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Abstract
A method of analyzing blood using a near infrared apparatus, in which monochromatic near infrared light in a wavelength range of 700 nm-1100 nm from the slit of the near infrared apparatus is applied to a ceramic plate through an optical fiber to measure a transmitted light intensity of the ceramic plate, which is a reference material for spectrum measurement. Next, in place of the ceramic plate, a blood collection tube containing a blood sample which has been stabilized at a predetermined temperature by a water bath has the near infrared light applied thereto. A so-called near infrared absorption spectrum in which absorbance has been plotted against wavelengths is obtained and information about object characteristics of the blood is extracted from the spectrum data using a calibration equation predetermined using the near infrared apparatus in relation to blood specimens with different, known object characteristics.
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