Shigeyuki Nakaji et al Department of Hygiene, Hirosaki University School of Medicine, Aomori, Japan. PMID: 15782035 [PubMed – indexed for MEDLINE] Photomed Laser Surg. 2005 Feb;23(1):60-5 OBJECTIVE: The aim of this study was to assess the long-term effects of low-level laser therapy (LLLT) through a retrospective survey using questionnaires. BACKGROUND DATA: The use of LLLT for chronic pain attenuation has been reported in the international literature for over 20 years. METHODS: We used a series of diode laser systems in which the most effective wavelength was consistently found to be 830 nm with an output power in continuous-wave of 60 mW. Subjects were 1,087 patients treated by LLLT at the Shiroto Clinic from April 1992 to August 1995. Questionnaires were sent to subjects in September and October 1996. RESULTS: The reply rate was 60.9%, comprising 662 questionnaires (265 males, 397 females, mean age of 53.4 years). The total efficacy rating (excellent plus good) immediately after LLLT was 46.8% in men and 47% in women. At the time of the survey, this rose to 73.3% in men and 76.8% in women, with positive effects also recorded on psychosomatic factors such as well-being, physical energy, general fatigue, mental vigor, and emotional […]
Les résultats de ces changements biochimiques et cellulaires des animaux et des patients incluent des avantages tels que la guérison accrue dans les blessures chroniques, les améliorations dans des dommages de sports et le syndrome de tunnel de carpal, la réduction de douleur de l’arthrite et des neuropathies, et l’amélioration des dommages après les crises cardiaques, la course, les dommages de nerf et la toxicité rétinienne. Mechanisms of Low Level Light Therapy HAMBLIN Michael R., Massachusetts General Hospital and Harvard Medical School and Harvard-MITDEMIDOVA Tatiana N., Massachusetts General Hospital and Tufts Univ. School of Medicine Progress in biomedical optics and imaging, 2006, vol. 7, no26, [Note(s): 614001.1-614001.12] The use of low levels of visible or near infrared light for reducing pain, inflammation and edema, promoting healing of wounds, deeper tissues and nerves, and preventing tissue damage has been known for almost forty years since the invention of lasers. Originally thought to be a peculiar property of laser light (soft or cold lasers), the subject has now broadened to include photobiomodulation and photobiostimulation using non-coherent light. Despite many reports of positive findings from experiments conducted in vitro, in animal models and in randomized controlled clinical trials, LLLT remains controversial. This likely is due to two main reasons; […]
Sanseverino NTM, Sanseverino CAM, Ribeiro MS et al. The Journal of Laser Therapy MILLENNIUM EDITION • VOLUMES 12 & 13 Lasers in Medicine and Surgery (2002) Supplement 14, Atlanta, Georgia. The improved outcome of laser therapy, if higher doses are given, is documented in the study by Sanseverino 10 patients with pain and limitation of movements of the jaw were treated by 785 nm GaAIAs laser, dose 45 J/cm2. The joint and tender points in the masticatory and otherwise involved muscles was applied three times per week during three weeks. A control group of 10 patients was given sham laser therapy. The evaluation was performed through subjective pain assessment and measurement of the movements of the jaw. There was a significant improvement in the laser group only.
J.M. Bjordal, C. Couppe University of Bergen, Dept. Physiotherapy Science, Bergen, Norway Abstract from the 7th International Congress of European Medical Laser Association, Dubrovnik, Croatia, June 2000. What is optimal dose, power density and timing for low level laser therapy in tendon injuries? A review of in vitro and in vivo trials Purpose: To investigate the effect of different laser treatment parameters on fibroblast inflammation and production of collagen fibers. Material : Controlled in vitro or in vivo trials with low level laser therapy (LLLT) Method : Literature search for trials published after 1980 using LLLT on Medline, Embase, Cochrane Library and handsearch of physiotherapy journals in English and Scandinavian languages. Optimal treatment parameters regarding timing, treatment frequency, dose and power density at target tissue were synthesized. Results : The literature search identified 31 controlled trials with LLLT on collagen tissue. Three in vitro trials were performed on stretch-induced and inflammation in fibroblast cultures and five in vitro trials were performed on collagen production. Optimal dose and power density for inhibition of prostaglandin PGE2 and interleukin 1- beta production was found to be 3.2-6.3 J/cm2 and 5.3 mW/cm2 measured at the target fibroblast cells after 5 days of irradiation. […]
Yoshimi Asagai, M.D.1, Atsuhiro Imakiire, M.D.2, Toshio Ohshiro, M.D.3, 1. Shinano Handicapped Children`s Hospital Shimosuwa, Nagano, Japan 2. Department of Orthopaedic Surgery, Tokyo Medical University Shinjuku, Tokyo, Japan 3. Japan Medical Laser Laboratory, Shinanomachi, Tokyo, Japan Presentation at World Association of Laser Therapy annual conference in Athens,Greece. 2000. Acute-phase injury is generally treated by localized cooling of the region, and rarely by the active use of low level laser therapy (LLLT) in Japan. Thermographic studies of acute-phase injury revealed that circulatory disturbances at the site of trauma occurred due to swelling and edema on the day following the injury, and that skin temperature was high at the site of the trauma and low at the periphery. Following LLLT, circulatory disturbances rapidly improved, while temperature in the high temperature zone around the site of trauma fell by 3 degrees on the average, but at the periphery the low temperature rose by 3 degrees on the average to nearly normal skin temperature. Clinically, swelling and edema improved. LLLT was also useful in treating necrosis of the skin in the wound area and in accelerating healing of surgical wounds of paralytic feet, which are prone to delayed, wound healing and also wounds […]