Study of reflecting mode brain blood-oxygen monitor with near infrared dual wavelength

Abstract：In the appatatus, near infrared light 760nm and 850nm are used as the media.It can noninvasively, real-time and continuously monitor brain blood-oxygen information.Based on the Lambert-Beer law, the dual wavelenth math and physics model was deduced, and this model only need measure one parameter which is light intension absorption rate n.Referring to the absorption of the brain tissue's ingredients in tissue optics, the wavelengths were choosed.Through the exprement and data analysis, the source-target distance was obtained and the hardware design thought was given.The validity of the monitor is proved by the exprement of holding one's breath.

Keyword：near infrared;reflecting mode;dual wavelength;blood-oxygen saturation;source-target distance;