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Near-Infrared light does not improve wound healing in horses

P. Michanek, T. Toth, E. Bergström and others

Equine Veterinary Journal (2020)

doi: 10.1111/evj.13266

• What did the research find?

Wound areas were mildly swollen and slightly sensitive to palpation in the first few days after wound creation, but none of the wounds showed clinical signs of infection. The wound area (P=0.2–0.9) and degree of swelling (P=0.2–1.0) did not differ between light-treated and untreated wounds on any day during the course of the study. The mean time to complete healing was significantly shorter for untreated wounds (49.0 days) than for light-treated treated wounds (51.8 days) (P=0.03).

• How was it conducted?

A 2 cm circular skin wound was created on each side of the neck of eight healthy horses. The wound on one side was treated with pulsating visible red light (λ≈637 nm) and near-infrared light (λ≈956 nm) for four minutes and 40 seconds on days 0–4, 7–11, 14–18 and 21–25. The other wound remained untreated. On day 0, 1, 2, 3, 4, 7, …

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