多功能激光血流血氧检测系统的研制

随着电子技术、激光技术和计算机技术的飞速发展，生物医学仪器亦有了长足的进步，研究无创伤、微型化和智能化的医疗器械已成为国内外学关注的热点．特别是各种无创检测设备的问世，标志着生物医学仪器的发展水平，同样也倍受广大患的青睐．本科研组在长期研究无创伤检测技术的基础上，成功地将激光多普勒血流参数、脉搏血氧和脑血氧饱和度的检测集成于一个系统中．其中的关键是：完成了多功能传感探头的设计，此探头可以根据需要准确地调节光源与接收器之间的距离，能够组成血流检测传感器、脉搏血氧和脑血氧检测传感器等，为医学与生理学研究提供了极大的便利；还明确提出了脑血氧饱和度的实用算法；优化了激光多普勒血流参数的DSP(数字信号处理)算法，即功率谱估算方法；以及尽量采用新型元器件，如用半导体激光器作为光源，达林顿光敏三极管作为信号接收器等．本较详细地阐述了系统的测量原理和软硬件设计。

THE DESIGN OF A MULTIFUNCTION BLOOD FLOW AND OXYGEN SATURATION DETECTION SYSTEM

The medical appliances get rapid progresses in these years because of the great developments of electronic technology, laser technology and computre technologes. So the design of safe, miniature and intellective medical appliances becomes a focus in the world. Through a long period of research on safe detection technology, our research group successfully designed a multifunction blood flow and oxygen saturation detection system, which can detect many parameters of the laser doppler blood flow, blood oxygen saturation of pulse and brain. In this system, we successfully devise a multifunction sensor, in which the length between the laser and receiver can be adjusted to offer great helps for the medical and phsyiology research; and get a practical method of calculating the oxygen saturation int he brain; and improve the DSP method of blood flow parameters - the method using power spectrograms; and use many new components, such as semiconductory lasers and Darlington optotransistors. This article will talk about the principles of detection and the design of software and hardware in detail.