脑血氧检测装置的原理与设计  

The Principle and Design of Measuring Instrurnent for Cerebral Oxygen Monitoring

作　　者：赵金城[1] 徐圣普[1] 边自朋[1] 崔云丽[1] 周炜[1] 

机构地区：[1]中国医学科学院生物医学工程研究所,天津300192

出　　处：《生物医学工程研究》2005年第2期73-76,共4页Journal Of Biomedical Engineering Research

摘　　要：根据脑血氧检测的基本原理提出了具有实用性脑血氧检测的设计方法。用Lambert-Beer定律推导出适于脑血氧检测的经验公式%ScO2=A+B(D1/D2)+C(D1/D2)2。采用了双CPU分块设计并创新设计了背景噪声消除电路。传感器的设计考虑了消除颅外组织影响和穿透深度的矛盾关系,选择了合理的发射和接收器件的间距,设计的装置选用了ANOLOGDEVICE公司的ADUC812单片机作为核心。结果表明,这是一款集成了多种接口有较高性价比的8位单片机,提高了抗干扰能力。经人体初步实验,证明了设计科学、有效。整机采用双CPU模块化设计,有效地发挥了CPU控制、运算功能,明显提高了仪器的可靠性。The principle and a new method of designing cerebral oxygen monitor was introduced. The custom formula for detecting cerebral oxygen from Lambert - Beer Law was derived. Based on this formula, the electric circuit that composed of two circuit models with double CPU construction was also designed. A creative designing circuit for eliminating backlight noise was developed. In transducer designing, reducing the influnce of skull and increasing the penetrating depth path through the brain were considered. The new ADUC812 CPU produced by Anolog Device Company was used. Results showed that it had high performance and good resisting disturbance ability with its more integrated ports. The experiments of human prove that this measurment device is very effective and reasonable. Double CPU construction design is of high reliability and has the advantage of improving the effentiency of CPU proccessing data.

关 键 词：脑血氧 近红外光 传感器 检测 设计 

分 类 号：R318[医药卫生—生物医学工程]