Therapy Laser: Depth of Penetration

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ความคิดเห็น • 8

  • @vishalvermaphysio
    @vishalvermaphysio 6 หลายเดือนก่อน

    Great explanation, sir can you give some information on class 4 laser 1064 nm wave length.

  • @Osipov_doc
    @Osipov_doc 6 หลายเดือนก่อน +1

    Great information, yhank you so much/ I use MLS M6 laser it is 3,3w 808nm and 500mw 905 nm, now i think that it is not enough poweful to treat deep tissues like nerve roots or herniated disc. What do you think about it? And the second question is what do you think about frequency, should we use it, or only CPW mode? What is the different between 810 and 1064nm, which is better? As iknow they both penetrates deep. Thanks again!

    • @drphilharrington
      @drphilharrington  6 หลายเดือนก่อน +1

      Hello my friend, thank you for watching my video. Wavelength is the primary determinant of laser depth of penetration, while power determines how much light (how many photons) will get to depths in the tissues. Wavelengths in the range of 790-810nm (let's just say 800nm) penetrate the deepest into human tissue, and a more powerful 800nm laser will deliver more photons to depth. The laser that I use is more powerful than the one you describe. But when it comes to power, we must be careful - the adage "if some is good, then more is better" does not apply. There is an optimal power for target tissues. I am in favor of using a CW and various pulse frequencies. There are definite proven benefits from pulse frequencies. However, the laser you use is a little silly - they run the 808nm in CW mode, while running the 905 in pulsed mode. They should match up the delivery modes, either use them both in CW or both in pulsing. The 1064nm wavelength is interesting, but from what I see right now, it does penetrate well, but the absorption curves I have seen show lower cytochrome c oxidase absorption for the 1064nm.

  • @Pbmt660
    @Pbmt660 ปีที่แล้ว +1

    Interesting that you neglect to point out 99.9% of all PBMT human clinical trials use class 3b or LEDs and not Class 4. I wonder why? So while you may be a proponent of Class 4, the definition of photobiomodulation therapy strictly states the power of the diode should be under 500 mW or Class 3b. I guess you know better....

    • @drphilharrington
      @drphilharrington  ปีที่แล้ว

      Hi DK, thank you for watching my video, and for your comment! Your first assignment is to watch this video: "Class 4 Laser Therapy: From Maligned Modality to Clinically Recommended Treatment" - th-cam.com/video/EuTzKg1cxJQ/w-d-xo.html

    • @drphilharrington
      @drphilharrington  ปีที่แล้ว

      Then, your reading assignment is that article, "Light-Emitting Diode Therapy and Low-Level Light
      Therapy Are Photobiomodulation Therapy", by Juanita J. Anders, BA, MS, PhD; Praveen R. Arany, BDS, MDS, MMSc, PhD; G. David Baxter, TD, BSc (Hons), DPhil, MBA; and Raymond J. Lanzafame, MD, MBA.
      In it, they state: "It is important to note that LLLT is commonly-and incorrectly-thought to
      refer to the power of the laser, as it is in this guest editorial by linking it to class 3b lasers. Historically, when this term was introduced by Calderhead11 it referred to the level of tissue reaction to the dose (‘‘high’’ vs. ‘‘low’’) of light delivered; thus, LLLT was defined as a dose of light that is below the level of the damage threshold and causes cellular photoactivation.
      Most importantly, PBMT (as with LLLT) is not defined by the output power of the device (determines
      ‘‘class’’) used but by the effective dose delivered to the target tissue. PBMT is performed not only by Class 3b lasers: both Class 3 and Class 4 devices are being used successfully to treat patients in human and veterinary medicine, alongside other devices based on LEDs. An important advance in PBMT was the recognition that optimization of transcutaneous therapeutic parameters should be based on the photonic dose reaching the target tissue, and that often requires higher doses of light at the skin surface to reach deeper tissues.

    • @drphilharrington
      @drphilharrington  ปีที่แล้ว

      After that, your assignment is to watch, "Why is it called 'Cold Laser'? - detailed version" - th-cam.com/video/bINWCnM-l60/w-d-xo.html

    • @drphilharrington
      @drphilharrington  ปีที่แล้ว

      Hey there, D K - will you reply to me? You say, "...the definition of photobiomodulation therapy strictly states the power of the diode should be under 500 mW or Class 3b...". That is simply not true. It depends on the reaction of the tissue, and not the output power of the laser device.