Scintigraphy: Get It While It’s Hot

Many times radiographs fail to show even stress fractures. Enter nuclear scintigraphy. This sophisticated technology uses radioactive material that, combined with a bone-seeking agent, is capable of locating stress fractures and other bone damage.
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It is not difficult for a practitioner to diagnose a complete displaced bone fracture in a horse. The animal normally will be lame, and there will be swelling. Radiographs will pinpoint the injury and its severity. However, it is not so easy when dealing with a nondisplaced stress fracture.

"Stress fractures," says M.J. Martinelli, DVM, PhD, Dipl. ACVS, of the University of Illinois, "are disruptions to the cortical bone microscopically without concomitant loss of the supporting architecture. If the bone is allowed to rest, the crack should heal uneventfully, and the bone should regain its normal physiological strength.

"In some cases, however, the bone may fail completely, and a displaced fracture results, often with disastrous consequences to the horse."

The disastrous consequence often is a catastrophic injury that can result in euthanasia of the injured animal. Researchers and practitioners agree that in many cases, the fracture could have been prevented if it had been known that a stress fracture or other damage existed. Removing the horse from training and competition and allowing the bone to rest and strengthen would have been all the therapy required in many cases

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Les Sellnow was a prolific freelance writer based near Riverton, Wyoming. He specialized in articles on equine research, and operated a ranch where he raised horses and livestock. He authored several fiction and nonfiction books, including Understanding Equine Lameness and Understanding The Young Horse. He died in 2023.

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