The Animals Developed Using Pulse Oximetry Components

The oxygen saturation of blood is an important animal and human physiological indicators. It is the important parameters of the respiratory system, blood oxygen transport capacity, metabolic and others. Many diseases or clinical diagnosis can cause insufficient supply of oxygen, which directly affect cell metabolism, even threat to life, so the real-time monitoring of arterial oxygen saturation is very important in the clinical ambulance.The traditional method of blood oxygen saturation measurement is to pump blood of human or animal, then analysis blood gas using electrochemical analysis, and calculate the blood oxygen saturation. This method is very complex and can not carry out continuous monitoring. The design in this paper use transmissive oximetry principles-Lambert-Beer law-the organization of the components corresponding to different wavelengths of light absorption coefficient difference, and then learn from the researchs on the choice of the ideal outcome of the wavelength, that is, when the Both blood and tissue of the perturbation changes the wavelength of the photon path length equal to the wavelength of the photon and two well-matched the average penetration depth, can reduce the heterogeneous composition of the organization to a higher accuracy and stability. Therefore, the end of this animal organizations such as the ears or tail, as the measurement site, using 660 nm wavelength of 940 nm red light and infrared light as the light source launched into the receiver tube receiving the light transmission through the organization of bed strength of the received signal Amplification, filtering, and finally gave MSP430 processor for further data processing and computing, and finally the data sent to BL420 multi channel data acquisition system.The work of this thesis includes dual-wavelength oximetry measurement principle, the hardware and software design and implementation. In the end, we analyse the various factors affecting the measurement precision and propose many methods to eliminate all interference signals.