Optics: measuring and testing – Blood analysis
Patent
1999-06-28
2000-10-10
Kim, Robert
Optics: measuring and testing
Blood analysis
356410, G01N 3348
Patent
active
061307432
ABSTRACT:
A colorimetric red blood cell sensor provides an automatic system for deting and preventing the further mixing of red blood cells and plasma. The sensor includes a processor that controls blue and red light sources so that they collectively generate pulsed blue and red light signals that are directed through blood serum held in an optically transparent container. The red and blue signals are 180 degrees out of phase, and hence staggered, with respect to each other. A photodetector system detects the pulsed red and blue light signals and generates output signals representing the intensities of the staggered signals received by the photodetector system. A microprocessor determines the ratio of the intensities of the red and blue light signals detected by the photodetector system. If the ratio exceeds a limit, the microprocessor generates a fluid control signal that prevents further mixing of red blood cells and plasma.
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Copeland Hugh D.
Mastny Gary F.
Patterson Andrew E.
Fendelman Harvey
Kagan Michael A.
Kim Robert
Lipovsky Peter A.
Natividad Philip
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