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Scott McClure, DVM, PhD, an assistant professor in the Department of Veterinary Clinical Sciences at Iowa State University, has been at the helm of much of the extracorporeal shock wave therapy (ESWT) research performed in horses over the past five years. At HMT's third annual ESWT symposium in Denver, Colo., on Dec. 3, McClure highlighted some of what vets learned in the past year on ESWT treatment.
In ongoing force plate studies, McClure says that he isn't seeing a lot of analgesia (insensitivity to pain) provided by ESWT, and that any analgesic effect is back to baseline within three days. Still, there is controversy when it comes to regulating ESWT.
McClure reviewed research showing that shock wave application induced degeneration and re-innervation of sensory nerve fibers in rats, as shown by immunohistochemical staining of skin and periosteum (connective tissue sheathing bones).
Also, he briefly described the research of Iowa State surgery resident Kevin Kersh, DVM, who found that horses had significant capillary ingrowth in treated tendons (with superficial flexor tendonitis) 85 days post-treatment.
A study of rabbit patella tendinopathy showed a 10% increase in tensile strength of the tendons at 16 weeks post-treatment. There was an increase in tendon cells, neovascularization (proliferation of blood vessels), and hydroxyproline content (indicating improved tendon fiber healing).
Similarly, a study in canine Achilles tendon-bone junctions showed new capillary and muscularized vessels at four to six weeks following ESWT treatment, and neovascularization (proliferation of blood vessels in tissue) of the bone-tendon junction was evident.
Finally, McClure touched on his study that was presented at the AAEP convention on ESWT for navicular syndrome treatment. He found that two-thirds of navicular horses improved an average of one lameness grade following ESWT and didn't regress in the year following treatment.
In ongoing force plate studies, McClure says that he isn't seeing a lot of analgesia (insensitivity to pain) provided by ESWT, and that any analgesic effect is back to baseline within three days. Still, there is controversy when it comes to regulating ESWT.
McClure reviewed research showing that shock wave application induced degeneration and re-innervation of sensory nerve fibers in rats, as shown by immunohistochemical staining of skin and periosteum (connective tissue sheathing bones).
Also, he briefly described the research of Iowa State surgery resident Kevin Kersh, DVM, who found that horses had significant capillary ingrowth in treated tendons (with superficial flexor tendonitis) 85 days post-treatment.
A study of rabbit patella tendinopathy showed a 10% increase in tensile strength of the tendons at 16 weeks post-treatment. There was an increase in tendon cells, neovascularization (proliferation of blood vessels), and hydroxyproline content (indicating improved tendon fiber healing).
Similarly, a study in canine Achilles tendon-bone junctions showed new capillary and muscularized vessels at four to six weeks following ESWT treatment, and neovascularization (proliferation of blood vessels in tissue) of the bone-tendon junction was evident.
Finally, McClure touched on his study that was presented at the AAEP convention on ESWT for navicular syndrome treatment. He found that two-thirds of navicular horses improved an average of one lameness grade following ESWT and didn't regress in the year following treatment.