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An investigation into the depth of penetration of low level laser therapy through the equine tendon in vivo.

Ryan T, Smith R - Ir Vet J (2007)

Bottom Line: A light sensor was applied to the lateral aspect, directly opposite the laser probe to measure the amount of light transmitted.However, it was associated with leg condition (F = 4.42, p = 0.0032).These results suggest that, when applying laser to a subcutaneous structure in the horse, the area should be clipped and cleaned beforehand.

View Article: PubMed Central - HTML - PubMed

Affiliation: 1The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, AL9 7 TA, UK. vetphysio@iolfree.ie.

ABSTRACT
Low level laser therapy (LLLT) is frequently used in the treatment of wounds, soft tissue injury and in pain management. The exact penetration depth of LLLT in human tissue remains unspecified. Similar uncertainty regarding penetration depth arises in treating animals. This study was designed to test the hypothesis that transmission of LLLT in horses is increased by clipping the hair and/or by cleaning the area to be treated with alcohol, but is unaffected by coat colour. A LLLT probe (810 nm, 500 mW) was applied to the medial aspect of the superficial flexor tendon of seventeen equine forelimbs in vivo. A light sensor was applied to the lateral aspect, directly opposite the laser probe to measure the amount of light transmitted. Light transmission was not affected by individual horse, coat colour or leg. However, it was associated with leg condition (F = 4.42, p = 0.0032). Tendons clipped dry and clipped and cleaned with alcohol, were both associated with greater transmission of light than the unprepared state. Use of alcohol without clipping was not associated with an increase in light transmission. These results suggest that, when applying laser to a subcutaneous structure in the horse, the area should be clipped and cleaned beforehand.

No MeSH data available.


Related in: MedlinePlus

Penetration of dry vs alcohol (wet)
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Figure 1: Penetration of dry vs alcohol (wet)

Mentions: Simple cleaning of the hair and skin surrounding the tendon with alcohol, caused a general increase in penetration of light through the tendons (p = 0.5762) (Figure 1, see p277). Readings which failed to register on the light sensor (i.e., those which produced a reading of 0) would indicate that the laser light introduced had been completely absorbed by the tendon and that none of this light had penetrated to the other side.


An investigation into the depth of penetration of low level laser therapy through the equine tendon in vivo.

Ryan T, Smith R - Ir Vet J (2007)

Penetration of dry vs alcohol (wet)
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3113823&req=5

Figure 1: Penetration of dry vs alcohol (wet)
Mentions: Simple cleaning of the hair and skin surrounding the tendon with alcohol, caused a general increase in penetration of light through the tendons (p = 0.5762) (Figure 1, see p277). Readings which failed to register on the light sensor (i.e., those which produced a reading of 0) would indicate that the laser light introduced had been completely absorbed by the tendon and that none of this light had penetrated to the other side.

Bottom Line: A light sensor was applied to the lateral aspect, directly opposite the laser probe to measure the amount of light transmitted.However, it was associated with leg condition (F = 4.42, p = 0.0032).These results suggest that, when applying laser to a subcutaneous structure in the horse, the area should be clipped and cleaned beforehand.

View Article: PubMed Central - HTML - PubMed

Affiliation: 1The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, AL9 7 TA, UK. vetphysio@iolfree.ie.

ABSTRACT
Low level laser therapy (LLLT) is frequently used in the treatment of wounds, soft tissue injury and in pain management. The exact penetration depth of LLLT in human tissue remains unspecified. Similar uncertainty regarding penetration depth arises in treating animals. This study was designed to test the hypothesis that transmission of LLLT in horses is increased by clipping the hair and/or by cleaning the area to be treated with alcohol, but is unaffected by coat colour. A LLLT probe (810 nm, 500 mW) was applied to the medial aspect of the superficial flexor tendon of seventeen equine forelimbs in vivo. A light sensor was applied to the lateral aspect, directly opposite the laser probe to measure the amount of light transmitted. Light transmission was not affected by individual horse, coat colour or leg. However, it was associated with leg condition (F = 4.42, p = 0.0032). Tendons clipped dry and clipped and cleaned with alcohol, were both associated with greater transmission of light than the unprepared state. Use of alcohol without clipping was not associated with an increase in light transmission. These results suggest that, when applying laser to a subcutaneous structure in the horse, the area should be clipped and cleaned beforehand.

No MeSH data available.


Related in: MedlinePlus