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Course Description

Splint bone fracture, or fracture of the small metacarpal/tarsal bones (MC/MT2 and MC/MT4) is a common injury in horses, and fractures come in various shapes, sizes and configurations. Principles of diagnosis and decision-making for surgery are discussed, including when to manage these fractures conservatively versus surgically, which horses may be good candidates for standing surgery, and possible complications of splint bone fracture. Fractures occur anywhere along the body of the splint bone; however, they are most common in the distal 1/3. Fractures in the distal 1/3 of the bone are usually simple and carry a good prognosis following surgical removal of the distal fragment; however, surgical removal is not always necessary. In contrast, fractures of the mid and proximal 1/3 are typically complicated by comminution, and/or soft tissue infection, osteomyelitis, and bone sequestration. Splint bone fractures may heal but occasionally the resulting callus will impinge on the suspensory ligament, necessitating removal of the offending callus (usually along with the remaining distal fragment). Ultrasound is often useful for assessing the degree of suspensory ligament desmitis. In cases where greater than 75% of the splint bone will be removed, the proximal fragment must be stabilized using internal fixation.

Benefits to the Learner

  • Understand the indications for surgical repair, surgical removal (ostectomy) or conservative management of splint bone fractures
  • Determine which horses are good candidates for standing surgical treatment of splint bone fractures
  • Anticipate potential complications of splint bone fractures, including joint instability, joint sepsis, and concurrent soft tissue injury

Accrediting Associations

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