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目的 研究不同频率及功率密度的毫米波对损伤脊髓的生物效应。方法 按Allen氏WD法致大鼠脊髓L1节段不完全性损伤 ,用波长 4.9,7.1,8.9mm ,输出功率密度 2 ,7,2 0mW /cm2的毫米波局部治疗大鼠损伤脊髓 ,治疗时间 30min ,每日 2次 ,治疗 2 0d ,观察皮层体感诱发电位(CSEP)及运动诱发电位 (MEP)变化。结果 7.1mm - 7mW /cm2 和 7.1mm - 2 0mW /cm2 的毫米波能使损伤脊髓的修复加快。结论 特定频率、一定功率密度的毫米波能促进损伤脊髓的修复
Objective To study the biological effects of millimeter waves of different frequencies and power densities on injured spinal cord. Methods According to Allen ’s WD method, incomplete spinal cord injury was induced in L1 segment of rat spinal cord. The injured spinal cord was treated with millimeter wave with wavelength of 4.9, 7.1, 8.9 mm and output power density of 2, 7 and 20 mW / cm2. 30min twice a day for 20 days. The changes of somatosensory evoked potential (CSEP) and motor evoked potentials (MEP) were observed. Results The millimeter wave of 7.1mm - 7mW / cm2 and 7.1mm - 20mW / cm2 accelerated the repair of injured spinal cord. Conclusion millimeter wave with certain frequency and certain power density can promote the repair of injured spinal cord