Availability of thermographical analysis for diagnosis of trigeminal nerve injury

本研究旨在探讨热像图检查在三叉神经损伤诊断中的临床应用价值。结果如下：1.在健康成人志愿者实验中，单侧下牙槽神经阻滞麻醉后，冷负荷试验显示下唇皮肤温度的差异。麻醉状态下TSEP（三叉神经体感诱发电位）波形平坦，但唇温变化不同。TSEP虽然是感觉神经损伤最客观的检查方法，但不能反映麻醉程度。2.根据IAN损伤患者的检查结果，热像图显示了安静时患侧下唇温度的差异，也清楚地显示了冷负荷试验后不同的温度恢复曲线。3.通过解剖单侧颈内动脉的实验动物研究发现，解剖单侧颈内动脉后，冷负荷试验后，在静息状态和恢复状态下的皮温均高于对照组，说明解剖单侧颈内动脉后，在静息状态和恢复状态下的皮温均高于对照组，说明解剖单侧颈内动脉后，在静息状态和恢复状态下的皮温均高于对照组。三叉神经支配区的皮肤温度发生变化，热像图检查对三叉神经损伤的诊断有一定的价值。

In this research, we assesed the clinical availability of the thermographical examination for diagnosis of trigeminal nerve injury. The results wer as follows;1.In the experiment using volunteer healthy adults, the block anesthesia for unilateral inferior alveolar nerve (IAN) revealed the difference of skin temperature of lower lip following the cold loading test. The examination of TSEP (Trigeminal somatosensory evoked potential) revealed the flatness of the wave form during the anesthetized condition in all subjects, though the changes of lip temperature were different between subjects. Although TSEP is the most objective examination for sensory nerve injury, this examination could not showed the levels of ansthesia.2.According to the examination for the patients with IAN injury, the thermographical examination revealed the difference of lower lip temperature in injury side at rest and also showed clearly the different recovery curve of temperature following cold loading test. This phenomena was clearly observed in these patients compared with the subjects anesthetized by IAN block ansethesia.3.According to the research using the experimental animals with dissection of unilateral IAN, the nerve dissection brought the higher temperature of the skin temperature at rest and at recovery condition following cold loading test.According to these result, the skin temperature of the area ineervated by trigeminal nerve is changed thermographical examination may useful for assessment of the presence of trigeminal nerve injury in patients.