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Monthly Archives: February 2008
LASER ACUPUNCTURE DOSE RANGE AND DOSE RATE EFFECTS
I am interested to get feedback on this. If we can suspend the debate about what acupuncture is and how effective it is for a minute …. it is my observation that a wide range of laser devices are used in acupuncture. Red* and near infrared*, 1mW to 500mW.
It is well documented that laser can inhibit as well as stimulate cellular function (read more here). Dose ranging studies and dose-rate (fluence rate) studies have been performed and we find that the thresholds for stimulation are quite low (at the target tissue level) and that they are in the range 5 – 30mW/cm2 (though this depends on what method of beam measurement was used by the original authors)(read more here)(and more here).
I would expect that the same wavelength, dose range and dose-rate issues will be true for acupuncture but do not recall seeing anything published. A quick glance at Pubmed finds 407 articles witeh the words Laser Acupuncture (click here to see) but zero return when the terms dose rate, dose range or fluence rate are added to the search.
We need dose rate studies and even more research with ineffective outcomes to help identify what actually works.
*(typically 632.8 and 660nm for red and 810nm – 830nm + 904nm)
Posted in PBM/LLLT
on LASER ACUPUNCTURE DOSE RANGE AND DOSE RATE EFFECTS
PMLS – free edition for download
If you are not already a subscriber how about you download this edition for free
Click here: Photomedicine and Laser Surgery
Posted in Books and Journals, Research
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ECI meeting in Tomar, Portugal papers published
If you missed the ECI meeting last year (2007) then you can buy related articles here:
Proceedings of Light-Activated Tissue Regeneration and Therapy
I have attended two ECI meetings now and will declare them my favourite on the conference calender. They are only every 2 – 3 years, they are one week long and in a remote location. Watch this space for the announcement of the next event.
Posted in Research
on ECI meeting in Tomar, Portugal papers published
World Health Organisation Bone and Joint Task Force Task Force support LLLT for neck pain
Results of the Bone and Joint Decade 2000-2010 Task Force on Neck Pain and Its Associated Disorders.
It is nice to see LLLT making it into mainstream medical recommendations.
Published in the journal Spine; a systematic review of the literature 1980 – 2006 on the use, effectiveness and safety of noninvasive interventions for neck pain and associated disorders. 139 papers admitted into this review.
CONCLUSIONS: For whiplash-associated disorders, evidence suggests that educational videos, mobilization, and exercises appear more beneficial than usual care or physical modalities. For other neck pain, the evidence suggests that manual and supervised exercise interventions, low-level laser therapy, and perhaps acupuncture are more effective than no treatment, sham, or alternative interventions.
Treatment of neck pain: noninvasive interventions: results of the Bone and Joint Decade 2000-2010 Task Force on Neck Pain and Its Associated Disorders.
Hurwitz EL, Carragee EJ, van der Velde G, Carroll LJ, Nordin M, Guzman J, Peloso PM, Holm LW, Côté P, Hogg-Johnson S, Cassidy JD, Haldeman S; Bone and Joint Decade 2000-2010 Task Force on Neck Pain and Its Associated Disorders.
Department of Public Health Sciences, John A. Burns School of Medicine, University of Hawaii at Mānoa, Honolulu, HI 96822, USA. ehurwitz@aii.edu
STUDY DESIGN: Best evidence synthesis. OBJECTIVE: To identify, critically appraise, and synthesize literature from 1980 through 2006 on noninvasive interventions for neck pain and its associated disorders. SUMMARY OF BACKGROUND DATA: No comprehensive systematic literature reviews have been published on interventions for neck pain and its associated disorders in the past decade. METHODS: We systematically searched Medline and screened for relevance literature published from 1980 through 2006 on the use, effectiveness, and safety of noninvasive interventions for neck pain and associated disorders. Consensus decisions were made about the scientific merit of each article; those judged to have adequate internal validity were included in our best evidence synthesis. RESULTS: Of the 359 invasive and noninvasive intervention articles deemed relevant, 170 (47%) were accepted as scientifically admissible, and 139 of these related to noninvasive interventions (including health care utilization, costs, and safety). For whiplash-associated disorders, there is evidence that educational videos, mobilization, and exercises appear more beneficial than usual care or physical modalities. For other neck pain, the evidence suggests that manual and supervised exercise interventions, low-level laser therapy, and perhaps acupuncture are more effective than no treatment, sham, or alternative interventions; however, none of the active treatments was clearly superior to any other in either the short- or long-term. For both whiplash-associated disorders and other neck pain without radicular symptoms, interventions that focused on regaining function as soon as possible are relatively more effective than interventions that do not have such a focus. CONCLUSION: Our best evidence synthesis suggests that therapies involving manual therapy and exercise are more effective than alternative strategies for patients with neck pain; this was also true of therapies which include educational interventions addressing self-efficacy. Future efforts should focus on the study of noninvasive interventions for patients with radicular symptoms and on the design and evaluation of neck pain prevention strategies.
http://www.ncbi.nlm.NIH.gov/sites/entrez?Db=pubmed&Cmd=DetailsSearch&Term=18204386%5Buid%5D
Posted in Research
on World Health Organisation Bone and Joint Task Force Task Force support LLLT for neck pain
LESS IS MORE
Effects of Low-Level Laser Therapy and Eccentric Exercises in the Treatment of Recreational Athletes With Chronic Achilles Tendinopathy.
Stergioulas et al Am J Sports Med. 2008.
This study demonstrates that a 30mW 830nm laser with a 0.5cm2 beam (= only 60mW/cm2 intensity) applied over 6 points along the Achilles tendon for 180 seconds per point accelerates recovery from chronic Achilles tendonitis.
Note the relatively large spot size of this 30mW laser (hence rather low intensity), and long treatment times used.
All the dose rate studies that I have read indicate that intensities in the tens of mW/cm2 range work best for anti inflammatory and healing effects in superficial tendon injuries, whereas the higher intensities (1,000 mW/cm2) are probably only suitable for analgesic effects.
Posted in Research
on LESS IS MORE
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