一、前言人体正常的生理活动以及由于病理变化常常引起一些身体组织发生形变。摄取这些微量变化信息在临床诊断中对于正确判断人体是否正常是极为重要的。由于这类形变极其微小,故要求摄取微变信息的传感器必须十分灵敏,另外,从临床使用角度而言,还要求传感器安全可靠,对人体无损伤,被测者无痛苦,操作简便等。目前,国内使用的大部分医用传感器在上述方面不够完善,存在各种缺点。近年来,光测技术在临床应用中发展得很快,这主要是由于光能避开强烈的电磁干扰,具有很高的电绝缘性,且可非侵入地检测病人各种症状信息,因而特别引人注目。 First, the foreword The normal human physiological activity and due to pathological changes often cause some body tissue deformation. Ingesting these trace changes in the clinical diagnosis of the right to determine the correct human body is extremely important. Due to such extremely small deformation, the sensor that requires the ingestion of micro-change information must be very sensitive. In addition, it is also required that the sensor be safe and reliable from the point of view of clinical use, and no damage to the human body. At present, most of the medical sensors used in China are not perfect in the above aspects, and have various disadvantages. In recent years, photometric technology has developed rapidly in clinical applications, mainly due to light energy to avoid strong electromagnetic interference, has a high electrical insulation, and can non-invasively detect various symptoms of the patient information, so in particular striking.