King C E, Clelland J A, Knowles C J, Jackson J R
Phys Ther. 1990 Jan;70(1):24-30. doi: 10.1093/ptj/70.1.24.
This study was conducted to examine the effects of helium-neon laser auriculotherapy on experimental pain threshold. Eighty healthy female and male subjects, aged 18 to 39 years, were assigned randomly to one of two treatment groups. Subjects in the Experimental Group (n = 41) received laser stimulation, and subjects in the Control Group (n = 39) received sham stimulation to appropriate acupuncture points on the left ear. Experimental pain threshold at the ipsilateral wrist was determined with an electrical stimulus immediately before and after treatment. The mean change (posttreatment minus pretreatment) for the Experimental Group was greater than the mean change for the Control Group (p less than .05). The Experimental Group demonstrated a statistically significant (p less than .05) increase in mean pain threshold after treatment, but the Control Group did not. Results indicate that helium-neon laser auriculotherapy can increase experimental pain threshold and suggest a possible alternative for patients intolerant of transcutaneous electrical nerve stimulation.
本研究旨在探讨氦氖激光耳穴疗法对实验性疼痛阈值的影响。80名年龄在18至39岁之间的健康男女受试者被随机分配到两个治疗组中的一组。实验组（n = 41）的受试者接受激光刺激，对照组（n = 39）的受试者接受对左耳相应穴位的假刺激。在治疗前后立即用电刺激测定同侧手腕的实验性疼痛阈值。实验组的平均变化（治疗后减去治疗前）大于对照组的平均变化（p小于0.05）。实验组在治疗后平均疼痛阈值有统计学意义的升高（p小于0.05），而对照组没有。结果表明，氦氖激光耳穴疗法可提高实验性疼痛阈值，并为不耐受经皮电神经刺激的患者提供了一种可能的替代方法。
