利用近红外光谱监测皮肤血氧输运

The Use of Near Infra-red Spectroscopy for Monitoring Perfusion and Oxygen of Skin

利用近红外光谱无创监测移植手术后的皮瓣成活状况 ,是近红外组织氧检测技术的最新应用之一。本文介绍了我们设计的利用光纤传导的近红外皮肤血氧监测系统 ,该系统可以灵活调整光源～探测器间距以适应皮层检测。利用该系统进行的前臂皮肤阻断试验中 ,静脉阻断时皮肤内有显著的血液充盈现象 ,全阻断时氧含量明显下降。实验表明 ,利用近红外光谱法监测皮瓣血氧输运情况是非常有效的 ,特别是可以比较好地监测静脉回流情况。

Near infra-red spectroscopy (NIRS) seems to be an ideal non-invasive technique for the postoperatively monitoring of plastic surgery in recent study. In this paper, a system utilizing near infra-red reflectance spectroscopy to access the blood perfusion and oxygen supply in skin was described. The bean-is of light were transmitted by optical fibers so that the distance between light source and detector could be adjusted easily. The forearm occlusion experiments on human body were performed using this system. In venous occlusion the concentration of both oxygenated hemoglobin and deoxygenated hemoglobin increased significantly because of the Venous outflow was impeded. In total occlusion the oxygenaed hemoglobin concentration decreased, deoxygenated hemoglobin concentration increased and the blood volume remained unchanged. The experimental results indicate that NIRS is potential to monitor the circulation of skin flap, especially the venous flow.