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Diagnostic device for measuring information on blood in a living object

  • US 5,564,418 A
  • Filed: 03/28/1994
  • Issued: 10/15/1996
  • Est. Priority Date: 03/26/1993
  • Status: Expired due to Fees
First Claim
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1. A diagnostic device comprising:

  • irradiation means for irradiating light on a predetermined position of a part of a living object;

    detection means for detecting light derived from the living object;

    converting means for converting the detected light into a first electric signal; and

    calculation means for performing a first calculation process on the first electric signal to output a second electric signal representing a change in concentration of hemoglobin at the predetermined position of the part of the living object wherein the change in concentration of hemoglobin is caused by injecting a blood diluting liquid as a tracer into the living object, performing a second calculation process on the second electric signal to calculate at least one of a blood flow, a degree of oxidation of hemoglobin, and an absolute concentration of hemoglobin.

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