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Hematocrit measuring apparatus

  • US 4,745,279 A
  • Filed: 01/02/1986
  • Issued: 05/17/1988
  • Est. Priority Date: 01/02/1986
  • Status: Expired due to Fees
First Claim
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1. Apparatus for measuring the hematocrit of a flowing bloodstream in real time, comprising:

  • (a) transparent cuvette means for containing said flowing bloodstream;

    (b) infrared light source means adjacent said cuvette means for illuminating said bloodstream;

    (c) detector means adjacent said cuvette means for detecting said infrared light after diffusion thereof by said bloodstream; and

    (d) signal-producing means for producing a hematocrit signal which is a predetermined function of said detected diffused light;

    (e) second detector means for compensating said first-named detector means; and

    (f) second light source means for directly illuminating the said second detector means, said second light source and said first-named light source being connected in series;

    (g) said signal-producing means being arranged to produce a hematocrit signal which is a function of the ratio of the light values senses by said first-named and second detector means, respectively.

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