Effect of Low-level-LaserTherapy

激光（光放大受激辐射）是一种人造射线，它是单色的、相干的和定向的。低反应水平激光治疗（LLLT），输出功率小于500 mW的激光，已被推荐用于康复，因为有证据表明这种形式的电磁能量可能是生物刺激，促进愈合和减轻疼痛。特别是星状神经节和穴位照射对减轻疼痛和改善外周循环是安全有效的。本研究采用偏振近红外线照射系统对正常志愿者进行LLLT治疗，通过对正常志愿者的出汗反应进行热分析和定量分析，探讨LLLT的生理效应。星状神经节和穴位LLLT能有效改善外周血流量，减少局部出汗，表明其对交感神经功能的抑制作用。激素反应没有差异，但LLLT显著减少了白色血细胞和自然杀伤细胞亚群。

A LASER (light amplification of stimulated emission of radiation) is the artificial ray, which is monochromatic, coherent and directional. Low reactive level laser therapy (LLLT), outputting laser light with less than 500mW power, have been recommended for use in rehabilitation because there is some evidence that this form of electromagnetic energy may be biostimulative, facilitate healing and reduce pain. Especially it was reported that the irradiation to stellate ganglion and acupuncture points is safe and effective to reduce pain and to improve the peripheral circulation in human. It is difficult to make definitive recommendations for the clinical application of LLLT in rehabilitation, so that we have to study and reveal the mechanism of LLLT effects.In this study, using polarized near-infrared irradiation system as LLLT in normal volunteer, themologial and quantitative perspiratory responses were analyzed to demonstrate the physiological efficiency. And by their blood sampling, hormonal and immunological responses were analyzed.The LLLT to stellate ganglion and to acupuncture points is effective to improve the peripheral blood flow and reduction of local perspiration, that indicated the suppressive effect of sympathetic nerve function. There were no differences in hormonal responses, but the LLLT was significantly reduced white blood cells and natural killer cell subsets.