Comparing the effects of low energy laser and acupuncture was conducted in 14 patients with gonarthrosis. Effectiveness on the pain on going up or down stairs, range of motion (ROM) of knee joint and tenderness were examined. After acupuncture treatment, the pain on going up or down stairs, and ROM of knee joint were significantly improved. Laser therapy showed the same significant effects both on the pain on going up or down stairs and ROM of knee joint. In addition, laser therapy showed a significant effect on tenderness. In the statistical evaluation, no remarkable difference was shown between acupuncture therapy and laser therapy. Present data suggest that the laser therapy is as effective as acupuncture therapy in gonarthrosis.

Laser-Doppler velocimetry (LDV) was used to evaluate the effects of low energy laser irradiation on peripheral circulation disturbance in patients with collagen diseases, progressive systemic sclerosis (PSS) and systemic lupus erythematosus (SLE).
Using a commercially available LDV flometer (Periflux, Perimed KB, Sweden), the response to laser irradiation at the acupuncture points of Tian zhu, Feng chi, Jian jing, Shou san li, Jing qu, He gu, Stellate ganglion, was recorded in 4 patients with PSS and 6 with SLE. The digital pitting scars and Raynaud's phenomenon were observed in all the patients. The low energy of 10mW laser was irradiated for 1 minute at each acupuncture points, and LDV flow values ware recorded in fingertips at room temperature 25±0.5°C. Ten minutes after the laser irradiation, the LDV flow values increased significantly (p<0.5).
Present data suggest that the low energy laser irradiation to patients with PSS or SLE who suffered from circulation disturbance is effective.