Snyder-Mackler L, Bork C E
Department of Physical Therapy, Sargent College of Allied Health Professions, Boston University, MA 02215.
Phys Ther. 1988 Feb;68(2):223-5. doi: 10.1093/ptj/68.2.223.
The purpose of this randomized, double-blind study was to determine the effect of a helium-neon (He-Ne) laser on latency of peripheral sensory nerve. Forty healthy subjects with no history of right upper extremity pathological conditions were assigned to either a Laser or a Placebo Group. Six 1-cm2 blocks along a 12-cm segment of the subjects' right superficial radial nerve received 20-second applications of either the He-Ne laser or a placebo. We assessed differences between pretest and posttest latencies with t tests for correlated and independent samples. The Laser Group showed a statistically significant increase in latency that corresponded to a decrease in sensory nerve conduction velocity. Short-duration He-Ne laser application significantly increased the distal latency of the superficial radial nerve. This finding provides information about the mechanism of the reported pain-relieving effect of the He-Ne laser.
这项随机双盲研究的目的是确定氦氖（He-Ne）激光对外周感觉神经潜伏期的影响。40名无右上肢病理状况病史的健康受试者被分为激光组或安慰剂组。沿着受试者右侧桡浅神经12厘米段的六个1平方厘米区域分别接受He-Ne激光或安慰剂照射20秒。我们使用配对样本t检验和独立样本t检验评估测试前和测试后潜伏期的差异。激光组的潜伏期有统计学意义的增加，这与感觉神经传导速度的降低相对应。短时间应用He-Ne激光显著增加了桡浅神经的远端潜伏期。这一发现为He-Ne激光所报道的止痛效果机制提供了信息。
