High-intensity laser for acupuncture-like stimulation
The insertion of needles into specific parts of the body was shown to provide analgesic and therapeutic effects. In this study, we tested the analgesic effects of high-intensity infrared laser for acupuncture-like stimulation. Twelve adult Sprague–Dawley rats weighing 230 to 250 g were randomly assigned to laser, needle, or restraint groups. Stimulation was directed to the meridian point Taixi (KI 3) for 10 min. For laser stimulation, a pulsed Er:YAG system was used. The laser settings were adjusted to provide a focal raise in the skin temperature to about 45°C. The anti-nociceptive effect was evaluated by the tail-flick test. Both needling and laser stimulation significantly increased the tail-flick latency. Peak needling effect was observed immediately after treatment, while laser stimulation was effective both immediately and 45 min after treatment. High-intensity laser stimulation may be used alternatively or in combination with conventional acupuncture needling for pain relief.
KeywordsLasers Acupuncture Analgesia Rats
This study was presented in part at the 11th World Congress on Pain (Sydney, Australia), 2005. It was supported by a grant-in-aid for Scientific Research from JSPS (No. P05242). KMS is a JSPS postdoctoral fellow.
- 9.Unschuld PU (2003) Huang Di nei jing su wen. University of California Press, BerkeleyGoogle Scholar
- 10.BCTCM (1980) Essentials of Chinese acupuncture. Foreign Languages Press, BeijingGoogle Scholar
- 15.Chang HT (1986) Research on acupuncture, moxibustion, and acupuncture anesthesia. Science Press, BeijingGoogle Scholar