智能化无创血氧饱和度检测系统的研究

无创脉搏血氧饱和度仪能够快速实时进行血氧饱和度的测量，在临床中得到广泛的应用，针对复杂生物组织如何建立相对准确的数学模型是提高血氧仪精度的关键问题，本文分析了光通过人体组织的传输特性，采用辐射传输理论，并考虑散射效应，提出了一种新型无创脉搏轿氧仪的设计方案，有效地减少了血氧仪的测量误差，通过对PC机联网，实现了血氧测量的智能化。

Intelligent System for Noninvasive Measurement of Blood Oxygen Saturation

The pulse oximetery, a widely used noninvasive measurement of arterial oxygen saturation, has numerous applications in clinical physiological monitoring. How to establish the mathematical model of the complicate biological tissue is the key of improving the pulse oximetery precision. According to the radiation theory as well as the dispersion domino effect, a novel measurement system of pulse oxygen saturation is presented based on the Lambert beer principle by using the relative intensities at two wavelengths in the red and infrared ranges. The transmission characteristics of two kinds of light through the tissue are analyzed. At the same time, the design of software and hardware is also introduced. The method can effectively reduced the measurement errors of oxygen saturation. By netting with PC, the intelligence of the oxygen saturation measurement is also accomplished. The system is satisfactory in clinical monitoring by series of comparing test.