Equine Research Articles
Diagnosing and Treating Back Pain in the Horse

A. Kent Allen, DVM; Virginia Equine Imaging, AAEP Proceedings 2010

  • 115 horses had radiographs taken of the thoracolumbar spine during January 2008 to December 2009
  • 74 cases were available for follow-up

Results: 89% (66) had positive outcome to ESWT treatment (1,000-2,000 pulses at Energy Level 6)

Length of treatment efficacy: 30% (22) of horses improved for 2-4 months, 28% (21) improved for 4-6 months, and 31% (23) improved for greater than 6 months

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ESWT and Equine Tendon Healing

Alves, A; Brunna PA; et al. International Society for Musculoskeletal Shock wave Therapy

  • 10 horses without health problems
  • Superficial digital flexor tendinitis was induced in both front limbs by collagenase injections
  • Right front limb of each horse was treated with ESWT (3 treatments, 3-week intervals) while left front limb remained control.
  • Biopsy specimens were collected on 120th day

Results: ESWT improved scar remodeling and tendon wound collagen maturation.

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Effects of ESWT on Wounds of the Distal portion of the Limbs in Horses

Morgan, D.; McClure S, et al. JAVMA May 2009.

  • Randomized controlled trial with 6 healthy horses
  • 4cm diameter full-thickness wound was created on the dorsomedial aspect of each metacarpus
  • Two 3cm diameter wounds created on dorsomedial aspect  of each metatarsus.
  • One randomly selected metacarpal wound and a randomly selected pair of metatarsal wounds were treated once weekly with ESWT
  • Metacarpal wounds – collected swab specimens
  • Metatarsal wounds – biopsied after 2 and 4 weeks

Results: Healing time for treated wounds (mean, 76 days) was significantly shorter than untreated wounds (90 days)

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ESWT on Experimentally Induced Osteoarthritis in Middle Carpal Joints of Horses

Frisbie, D.; Kawcak, McIlwraith, C. AJVR April 2009.

  • Twenty-four 2 to 3-yr. old horses without evidence of lameness
  • OA induced arthroscopically in 1 middle carpal joint of of each horse
  • 14 days following inductions, horses were treated with sham ESWT probe (placebo n=8), PSGAG administered IM every 4 days for 28 days (8), or ESWT administered on days 14  and 28 with focused unit (8)

Results: No adverse treatment-related events were detected. Degree of lameness in horses treated with ESWT improved significantly, compared to sham group.

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