本文在深入了解透射式血氧饱和度测定原理及其方法之后，首先明确用近

红外光谱法测定组织血氧饱和度时，无论是透射式检测手段还是反射式检测，

其依据的基本原理都是Lambert-Beer定律和组织中各成分对应不同波长光的

吸收系数的差异。在对检测到的完全反应血液中氧合血红蛋白和脱氧血红蛋白

含量变化的脉动分量的处理上，由于透射检测中的处理方法用于反射时灵敏度

降低，论文中提出了一种新的能更灵敏反应血氧变化的参量作为确定血氧饱和

度的依据。-This in-depth understanding of the transmission type blood oxygen saturation determination theory and method, first of all clear by Near Infrared Spectroscopy tissue oxygen saturation, either transmissive or reflective detection Shouduan Shi detection, based on the basic principles are Lambert-Beer law and the organization of various components corresponding to different wavelengths of light absorption coefficient of the difference. Detected in the complete reaction of the blood oxygenation changes in hemoglobin and deoxy-hemoglobin content of the pulse component of the treatment, due to transmission detection sensitivity when dealing with methods for reducing reflection, the paper proposes a new more sensitive response changes in blood oxygen parameters as the basis for determining blood oxygen saturation.