| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring apparatus for a blood amount in a living-body tissue by which an oxygenated red corpuscle amount, a deoxygenated red corpuscle amount and an oxygen saturation degree can be measured precisely without being influenced by a difference in the absorption degree of light inside the living-body tissue. SOLUTION: The measuring apparatus is provided with a measuring-light output part in which three or more kinds of optical light sources 11, 12 and 13 are irradiated directly at the living-body tissue 8 at a prescribed intensity; a detection part 7a and a detection part 7b in which the intensity of transmitted and scattered light due to the passage of output measuring light through the tissue 8 is detected in two or more measuring points; a computing part 17a and a computing part 17b, in which the oxygenated red corpuscle amount in the tissue 8, the deoxygenated red corpuscle amount and an oxygenation degree as the ratio of the oxygenated red corpuscle amount to a total red corpuscle amount, or an oxygenation degree as the ratio of an oxygenated hemoglobin amount to a total hemoglobin amount, are computed on the basis of the light absorption amount in the tissue 8 obtained from the intensity difference between the output measuring light and the detected transmitted and scattered light; and a correction part 20 which corrects an error generated by the light absorption degree of the tissue 8 itself, with reference to respective measured values computed from the two or more measuring points. COPYRIGHT: (C)2003,JPO |
