用近红外光谱检测人体组织氧含量

为防止病人因组织缺氧而产生各种临床并发症 ,需要检测病人的组织氧。红外组织氧含量检测技术是一种新的无损检测技术 ,相对于脉搏氧饱和度检测 ,可以检测局部人体组织的氧合状况。用自行设计的近红外组织氧含量检测仪 ,进行了前臂阻断实验、婴儿脑氧实验和肌氧实验。检测中考虑了近红外传感器与人体的耦合 ,合理选择了光源与检测器的距离以及检测器的数目。用该仪器测量结果与生理变化相符。结果表明 :近红外方法可以实时无损地检测人体组织的氧合状况

Measuring human tissue oxygenation with near infrared spectroscopy

Tissue oxygenation of patients need be measured and monitored to avoid complications caused by hypoxia in medical procedures. A new noninvasive technique was introduced to measure tissue oxygenation using near infrared spectroscopy (NIRS). The method gives better results than measurements of pulse oxygenation. A tissue oximeter was developed using NIRS. Experiments of forearm occlusion, pediatric brain oxygenation and muscle oxygenation were made by the oximeter. The coupling between the near infrared sensor and human body was in corporated into the system, and the distances between the light source and the detectors as well as the number of detectors were optimized. The results were consistent with physiological changes. Human tissue oxygenation can be noninvasively measured real time by NIRS.