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Diagnosing shoulder dislocations: time for a change of view.

Posterior shoulder dislocations are uncommon, with frequent delays in the diagnosis. Three missed posterior dislocations within our hospital caused us to review the standard radiographs taken and the knowledge of this condition. A total of 40 radiographers and 40 casualty officers were surveyed. Of the radiographers, 63% felt it unnecessary to perform two views, they complained that laterals were difficult to obtain because of patient distress. All the radiographers surveyed knew of alternative views, but would not perform them unless specifically requested. Casualty officers claimed always to request two views, but did not in 75% of cases. Only 20% were aware of alternative views, all would accept one view for exclusion of a dislocation and none were aware of the radiographic signs associated with a posterior dislocation. Increased education and a change of view would assist in decreasing the rate of missed diagnoses.