NAVLE Musculoskeletal

Equine Fractures Study Guide

Equine fractures represent one of the most challenging aspects of equine practice and are a major cause of morbidity and mortality in horses.

Overview and Clinical Importance

Equine fractures represent one of the most challenging aspects of equine practice and are a major cause of morbidity and mortality in horses. The unique anatomy and biomechanics of the equine limb, combined with the horse's size and flight response, create significant challenges for fracture management. Understanding fracture classification, emergency stabilization, treatment options, and prognosis is essential for the NAVLE examination.

Fractures in horses can be classified as traumatic (kicks, falls, racing injuries) or stress-related (accumulated microdamage from repetitive loading). The location, configuration, and whether the fracture is open or closed significantly impact treatment decisions and prognosis.

Classification Description
Open vs Closed Open (compound): skin penetrated, bone exposed. Closed: skin intact. Open fractures have significantly worse prognosis due to infection risk.
Complete vs Incomplete Complete: fracture extends through entire bone. Incomplete (fissure/stress): partial cortical disruption. Incomplete fractures risk propagation to complete.
Simple vs Comminuted Simple: two fragments. Comminuted: multiple fragments. Comminuted fractures are more difficult to repair and have worse prognosis.
Articular vs Non-articular Articular: involves joint surface (risk of osteoarthritis). Non-articular: does not involve joint. Articular fractures require anatomic reduction.
Displaced vs Non-displaced Displaced: fragments separated from normal position. Non-displaced: fragments in anatomic alignment. Displacement affects treatment approach.
Configuration Transverse, oblique, spiral, longitudinal (sagittal), chip, slab. Configuration affects stability and repair method.

Fracture Classification

Understanding fracture terminology is essential for communication and treatment planning. Fractures are described by multiple characteristics.

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