| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an oxygen saturation measuring device with high measuring accuracy. SOLUTION: The oxygen saturation measuring device is provided with a first light emitting device and a second light emitting device respectively applying irradiation light of a first wavelengthλ1 with an extinction coefficient of hemoglobin changed by oxygen saturation and irradiation light of a second wavelengthλ2 with an extinction coefficient of hemoglobin unchanged by the oxygen saturation to an organic tissue. The oxygen saturation is determined from a preset linear expression on the basis of an intensity ratio between back scattered light of the first wavelengthλ1 and back scattered light of the second wavelengthλ2. The first wavelengthλ1 is 730 nm and the second wavelengthλ2 is 830 nm. By this, since linearity of the oxygen saturation to the intensity ratio between the back scattered light of the first wavelengthλ1 and the back scattered light of the second wavelengthλ2 is improved, accuracy of the oxygen saturation is improved.</p> |
