Diagnostic device for measuring information on blood in a living object
First Claim
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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Accused Products
Abstract
Perform measurement of blood flow using physiological salt solution, which is harmless to living objects, as a tracer. The head portion (4) of a subject is alternately irradiated with laser light 1, and laser light 2. The light exiting from the head portion (4) is detected and converted to an electric signal. By performing a first calculation on this electric signal, a CPU (1) outputs a signal representing the change in concentration of hemoglobin in the head (4). Further, a second calculation process is performed on the electric signal which represents changes in concentration of hemoglobin generated by injection of the physiological salt solution. At least one of the blood flow or the absolute concentration of oxyhemoglobin and deoxyhemoglobin is displayed. Because a material safe to living objects is used as the tracer, measurement of the blood flow can be safely and repeatedly performed.
26 Citations
14 Claims
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1. A diagnostic device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A diagnostic device comprising:
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blood volume measuring means for measuring a volume of blood existing in a part of a living object and providing a measured value of the volume of blood; injection means for injecting physiological salt solution as a tracer into the living object; time measuring means for measuring a time required for the physiological salt solution to pass through a predetermined position of the part of the living object and providing a passage time; and computing means for computing a blood flow based on the measured value of the blood of volume and the passage time, wherein said blood volume measuring means comprises a light source irradiating near-infrared light on the predetermined position of the part of the living object, a photomultiplier tube receiving the near-infrared light derived from the living object, and processing unit processing the near infrared light derived from the living object to calculate the volume of blood. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification