Penetration Profiles of a Class IV Therapeutic Laser and a Photobiomodulation Therapy Device in Equine Skin.
Abstract: Photobiomodulation therapy (PBMT) effects depend on the energy settings and laser penetration. We investigated the penetration time profiles of two different light therapy devices, at the dark and light skin regions in horses. Six light skin and six dark skin adult clinically healthy Arab and Quarter horses were used. A cutometer was used to measure the width of the skin fold from both sides of the cervical area, followed by three measurements of the thickness of the same skin fold by transversal and longitudinal ultrasonography (US). The depth of light penetration was compared based on the percentage of penetration versus power, between a portable PBMT device versus a class IV laser device. The laser mean power output was measured with an optical power meter system for 120 seconds after penetrating the skin. Skin width and laser penetration were compared among equipment by paired "t" test. There was no difference in the width of the skin fold between measurements acquired by the cutometer against either longitudinal or transversal US or between the US measurements at cervical versus metacarpus area. Light penetration was greater in both kinds of skins in the PBMT (0.01303 ± 0.00778) versus class IV laser (0.00122 ± SD 0.00070) (P < .001). The PBMT device provided a greater energy penetration than the class IV laser in unclipped light and dark skin, suggesting that the former may produce a better therapeutic effect. The color of the skin changes penetration profiles of PBMT.
Copyright © 2019 Elsevier Inc. All rights reserved.
Publication Date: 2019-12-04 PubMed ID: 31952636DOI: 10.1016/j.jevs.2019.102846Google Scholar: Lookup
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Summary
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This study explores how much two different types of light therapy devices penetrate the skin of horses, and whether these penetration levels are affected by the color of the horse’s skin. The results revealed that a device known as a Photobiomodulation therapy (PBMT) has greater penetration in both light and dark skin compared to a class IV laser, suggesting it might offer better therapeutic effects.
Methodology
- Twelve adult, clinically healthy Arab and Quarter horses were selected for the study. Half had light skin and half had dark skin.
- The researchers made measures of the thickness of the horses’ skin folds with a device called a cutometer. They also used ultrasound to confirm these measurements.
- All measurements were taken at two different sites: the cervical area and the metacarpus area.
- A PBMT device and a Class IV laser device were used to penetrate the skin of the horses. The depth of penetration was recorded, as well as the output power of the lasers. The measurements were taken for a duration of 120 seconds after the light had penetrated the skin.
Findings
- The researchers found no difference in skin fold thickness measurements regardless of whether they were taken from the cervical or the metacarpus area. This suggests that these devices can penetrate the same depth regardless of where they are applied.
- In both types of skin (light and dark), the penetration was greater with the PBMT device compared to the class IV laser device.
- The researchers also found that the color of the horse’s skin affected the penetration profiles of PBMT. However, the study does not provide specific details about how exactly the skin color influenced the penetration levels.
Implications
- The results suggest that the PBMT device might be more effective for light therapy in horses as it appears to provide a greater energy penetration than the class IV laser.
- Further research is recommended to better understand how the horse’s skin color affects the penetration levels, especially in darker skin which could influence treatment outcomes.
Cite This Article
APA
Luna SPL, Schoen A, Trindade PHE, Rocha PBD.
(2019).
Penetration Profiles of a Class IV Therapeutic Laser and a Photobiomodulation Therapy Device in Equine Skin.
J Equine Vet Sci, 85, 102846.
https://doi.org/10.1016/j.jevs.2019.102846 Publication
Researcher Affiliations
- School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (Unesp), Botucatu, São Paulo, Brazil. Electronic address: stelio.pacca@unesp.br.
- Center for Integrative Animal Health, Salt Spring Island, British Columbia, Canada.
- School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (Unesp), Botucatu, São Paulo, Brazil.
- School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (Unesp), Botucatu, São Paulo, Brazil.
MeSH Terms
- Animals
- Horses
- Lasers
- Low-Level Light Therapy / veterinary
- Skin
Citations
This article has been cited 2 times.- Millis DL, Bergh A. A Systematic Literature Review of Complementary and Alternative Veterinary Medicine: Laser Therapy. Animals (Basel) 2023 Feb 14;13(4).
- Hoisang S, Kampa N, Seesupa S, Jitpean S. Assessment of wound area reduction on chronic wounds in dogs with photobiomodulation therapy: A randomized controlled clinical trial. Vet World 2021 Aug;14(8):2251-2259.
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