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laser frequencies

Hi. When comparing different Class 4 lasers on the market, I notice that every device works at different frequencies for different symptomatical treatments ( pain,edema, inflammation.... ). Ranging from 1 to 20,000Hz. I've done different literature searches but didn't find any publication related to frequencies and treatment goals- is there some knowledge in this forum? Thank you. Patrick

Patrick Herbors

5 months ago

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vetphysio.herbots113
vetphysio.herbots113

Prof Tim Watson said:

Patrick.Thank you for raising this issue. The same thing has been claimed for the Class 3 lasers that have been around for years - but I have looked at the literature and could not find the evidence (from published papers) to support those claims either. Clearly, there are some critical issues when it comes to laser 'treatment parameters' or 'dose' - the same for all EPA interventions. I can find evidence for wavelength, power, power density, energy, energy density and associated issues, but nothing that identifies pulsing or pulse frequency as a critical parameter. Like you I would be most interested to find out where this comes from - as if it is out there, I have completely missed it - despite looking. Will keep an eye on the responses from the laser experts - I do not claim to be one of them!!! Tim

Prof Tim Watson said:

Patrick.Thank you for raising this issue. The same thing has been claimed for the Class 3 lasers that have been around for years - but I have looked at the literature and could not find the evidence (from published papers) to support those claims either. Clearly, there are some critical issues when it comes to laser 'treatment parameters' or 'dose' - the same for all EPA interventions. I can find evidence for wavelength, power, power density, energy, energy density and associated issues, but nothing that identifies pulsing or pulse frequency as a critical parameter. Like you I would be most interested to find out where this comes from - as if it is out there, I have completely missed it - despite looking. Will keep an eye on the responses from the laser experts - I do not claim to be one of them!!! Tim

Thank you, Patrick, dvm

vetphysio.herbots113
vetphysio.herbots113

gvpetrov223 said:

Hi there. There is an interesting article about that topic by Jan Tuner. Here it is: http://www.laserannals.com/2017/02/19/to-pulse-or-not-to-pulse-that-is-the-question/ I hope it helps..

Thank you, Patrick,dvm

vetphysio.herbots113
vetphysio.herbots113

Prof Alison Hoens said:

Good afternoon A colleague of mine, Dr Joseph Anthony at the University of British Columbia, shared the following resources re this:

  1. Robertson et al (https://www.elsevier.com/books/electrotherapy-explained/robertson/978-0-7506-8843-7). However, it does not clarify that the recommendations are specific for any class of LASER. Nussbaum et al (https://www.ncbi.nlm.nih.gov/pubmed/12430152) and (https://www.ncbi.nlm.nih.gov/pubmed/term=desimone+christiansen+dore+1999)

Thank you

vetphysio.herbots113
vetphysio.herbots113

Prof Tim Watson said:

Patrick.Thank you for raising this issue. The same thing has been claimed for the Class 3 lasers that have been around for years - but I have looked at the literature and could not find the evidence (from published papers) to support those claims either. Clearly, there are some critical issues when it comes to laser 'treatment parameters' or 'dose' - the same for all EPA interventions. I can find evidence for wavelength, power, power density, energy, energy density and associated issues, but nothing that identifies pulsing or pulse frequency as a critical parameter. Like you I would be most interested to find out where this comes from - as if it is out there, I have completely missed it - despite looking. Will keep an eye on the responses from the laser experts - I do not claim to be one of them!!! Tim

Thank you Tim,. Patrick

vetphysio.herbots113
vetphysio.herbots113

Prof Alison Hoens said:

Good afternoon A colleague of mine, Dr Joseph Anthony at the University of British Columbia, shared the following resources re this:

  1. Robertson et al (https://www.elsevier.com/books/electrotherapy-explained/robertson/978-0-7506-8843-7). However, it does not clarify that the recommendations are specific for any class of LASER. Nussbaum et al (https://www.ncbi.nlm.nih.gov/pubmed/12430152) and (https://www.ncbi.nlm.nih.gov/pubmed/term=desimone+christiansen+dore+1999)

Thank you

Patrick

vetphysio.herbots113
vetphysio.herbots113

gvpetrov223 said:

Hi there. There is an interesting article about that topic by Jan Tuner. Here it is: http://www.laserannals.com/2017/02/19/to-pulse-or-not-to-pulse-that-is-the-question/ I hope it helps..

Thank you. The article doesn't clear the problem, but opens some doors

Patrick

Prof Alison Hoens
Prof Alison Hoens

Good afternoon A colleague of mine, Dr Joseph Anthony at the University of British Columbia, shared the following resources re this:

  1. Robertson et al (https://www.elsevier.com/books/electrotherapy-explained/robertson/978-0-7506-8843-7). However, it does not clarify that the recommendations are specific for any class of LASER. Nussbaum et al (https://www.ncbi.nlm.nih.gov/pubmed/12430152) and (https://www.ncbi.nlm.nih.gov/pubmed/term=desimone+christiansen+dore+1999)
gvpetrov223
gvpetrov223

Hi there. There is an interesting article about that topic by Jan Tuner. Here it is: http://www.laserannals.com/2017/02/19/to-pulse-or-not-to-pulse-that-is-the-question/ I hope it helps..

Prof Tim Watson
Prof Tim Watson

Patrick.Thank you for raising this issue. The same thing has been claimed for the Class 3 lasers that have been around for years - but I have looked at the literature and could not find the evidence (from published papers) to support those claims either. Clearly, there are some critical issues when it comes to laser 'treatment parameters' or 'dose' - the same for all EPA interventions. I can find evidence for wavelength, power, power density, energy, energy density and associated issues, but nothing that identifies pulsing or pulse frequency as a critical parameter. Like you I would be most interested to find out where this comes from - as if it is out there, I have completely missed it - despite looking. Will keep an eye on the responses from the laser experts - I do not claim to be one of them!!! Tim

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