Answer
Clavicle fractures may be caused by direct or indirect trauma. The most common mechanism is an indirect one in which the athlete falls onto the lateral shoulder, causing a compressive force across the clavicle. Examples of a direct mechanism would be a blow from a hockey stick or a direct fall onto the clavicle. At-risk athletes include those in football, hockey, and soccer and those at risk for falling during roller skating, skiing, bicycling, or horseback riding. A very high prevalence is also noted in MVAs. A less common mechanism is a fall onto an outstretched hand (ie, a FOOSH injury). The radiographs below depict clavicle fracture in a hockey player.
Comminuted fracture in a hockey player. Note the medial fragment tenting the skin.
Additional view of fracture displacement and comminution in a hockey player. The sternocleidomastoid is the deforming force of the medial fragment.
Radiographs after open reduction and internal fixation of a comminuted fracture in a hockey player.
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Media Gallery
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A posterior view demonstrating a closed clavicle fracture tenting the skin (arrow), which can potentially lead to an open fracture.
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Comparison of both clavicles, with the left tenting the skin (wide arrow).
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Close-up view of clavicle tenting the skin (arrow).
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Comminuted fracture in a hockey player. Note the medial fragment tenting the skin.
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Additional view of fracture displacement and comminution in a hockey player. The sternocleidomastoid is the deforming force of the medial fragment.
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Radiographs after open reduction and internal fixation of a comminuted fracture in a hockey player.
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Anteroposterior view of middle third clavicle fracture illustrating a relatively typical fracture pattern.
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Anteroposterior view of distal clavicle fracture, type II, showing wide displacement.
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The displacing forces on a midshaft clavicle fracture.
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The displacing forces on a distal clavicle fracture.
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Type I fracture of the distal clavicle (group II). The intact ligaments hold the fragments in place.
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A type II distal clavicle fracture. In type IIA, both conoid and trapezoid ligaments are on the distal segment, while the proximal segment, without ligamentous attachments, is displaced.
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A type IIB fracture of the distal clavicle. The conoid ligament is ruptured, while the trapezoid ligament remains attached to the distal segment. The proximal fragment is displaced.
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Anatomy of the clavicle indicating potential fracture sites.
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Nondisplaced middle clavicle fracture.
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Displaced fracture of middle clavicle.
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Displaced middle clavicle fracture.
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Clavicle fracture with rib fractures. Remember to look for associated injuries.
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