应用红外热像技术监测硬膜外阻滞平面

Study on plane of sensory block in epidural anaesthesia by medical infrared imaging technology

【目的】应用红外热像技术监测硬膜外麻醉后热图变化,同针刺法测定的痛觉阻滞平面进行比较。【方法】选择下腹部手术患者,在T12~L1椎间隙行硬膜外穿刺置管,监测硬膜外单次注药后痛觉阻滞平面,采集红外热像图。【结果】硬膜外阻滞后5min温度色码较麻醉前上移,红外热图色码平均温度较阻滞前有显著性差异(P<0.01),在神经平面(T12~L1、L4~L5、S1区域温度色码在阻滞后5 min发生明显变化。【结论】硬膜外阻滞后红外热像的最高温度平面高于痛觉阻滞平面,可以间接通过红外热像技术估计痛觉阻滞平面,红外热图色码温区在L4~L5、S1所支配的神经平面色码变化非常显著,可以依据足部的颜色变化来作为判断硬膜外阻滞是否成功的标准。

[ Objective ] To explore the plane of sensory block in epidural anaesthesia by medical infrared imaging technology and the association between needle-punching and infrared imaging technology. [Methods] Lower abdomen sursery patients with epidural catheter inserted to the T12-L1 interspace were detected as study objects. The planes of sensory analgesic to needle-punching were measured at deffrent times. The infrared images were detected. [Results] Compared with the planes of sensory analgesic to needle-punching, the elevating plane of sensory block increased significantly. The color code of temperature in the area of T12~L1 and IA^LS, S1 increased obviously. [ Conclusion ]The uppermost plane of temperature elevation was higher than the upper limit of sensory analgesic to needle-punching. The Plane of Sensory block in epidural anaesthesia can be assessed by medical infrared imaging technology. The color code of temperature of infrared imaging after epidural anaesthesia have great changes, espectilly in the area of foot （L4~L5 ,S1 plane）. So the colour changes of foot can be used as a standard to assesse success or failure during epidural anaesthesia.