Effects of a laser acupuncture therapy on treating pain

Wai Wong, Shaojun Xiao, Wing Yuk Ip, Xia Guo

Research output: Journal article publicationConference articleAcademic researchpeer-review

1 Citation (Scopus)


Laser acupuncture (LA) has been utilized as a combined approach of Chinese traditional acupuncture and low-level laser therapy since its-emergence in 1973. Its mechanisms are not well understood and the standardization of clinical protocols has not been established. In this study, we used a diode laser to irradiate on four acupuncture points for normal subjects to investigate the effect of LA. For each point, the irradiation lasted for three minutes. The median nave conduction velocity was measured within a 30 minutes interval at day 1, day 5, and day 10 respectively. Patients with chronic carpal tunnel syndrome (CTS) were given LA therapy for three stages at most with a one-week interval between two stages. Treatment outcome measurements included patients' subjective feedback (McGill pain questionnaire, VAS) and objective measurements (physical examination, kinesiological properties and NCSs). It was a randomized single-blind controlled trial. For normal subjects, motor nerve fiber was sensitive to LA and the motor conduction velocity was decreased very significantly (p<0.001). Besides, it was found that LA resulted that sensory nerve conduction velocity was decreased significantly when it was measured 30 minutes after the subject had received LA application. For CTS patients, the outcomes except pinch test indicated that LA could improve patient's conduction. These results suggested that LA could cause the change of nerve conduction.
Original languageEnglish
Pages (from-to)104-113
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Dec 2001
EventLaser Florence 2000 A Window on the Laser Medicine World - Florence, Italy
Duration: 18 Oct 200022 Oct 2000


  • Carpal tunnel syndrome
  • Laser acupuncture
  • Low-level laser therapy
  • Nerve conduction studies

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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