APPARATUS FOR MEASURING CONCENTRATION AND OXYGEN SATURATION OF HEMOGLOBIN.

摘要

A light beam having a first wavelength (lambda 1) is applied to the blood from a first light radiation section, while a light beam having a second wavelength (lambda 2) is applied from second and third light radiation sections different in positions from the first radiation section and from each other to the blood and the respective reflected light intensity (I1,I2,I3) is detected. A first correction value (X) for correcting the reflected light intensity ratio (I2/I3) is calculated by a first correction value operation section (40) and a second correction value (C1) is calculated by a second correction value operation section (42) by use of this first correction value and the reflected light intensity (I3). The reflected light intensity ratio (I1/I2) is corrected by use of this second correction value and an oxygen saturation in the blood is operated based on correlation function by use of the corrected reflected light intensity ratio (Rs). The reflected light intensity ratio (I2/I3) is corrected by the coefft. of correction thus operated and the haemoglobin concn. in the blood is operated based on correlation function by use of the reflected light intensity ratio thus corrected.