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- radial head subluxation
- usually 1-3 years of age
- often after sudden longitudinal traction on extended arm with wrist in pronation
- tearing of annular ligament attachment to radial neck, with detatched portion trapped between subluxed raidal head and capitellum
- children refuse to use affected arm and hold in a flexed pronated position
- traditionally, reduce by supination of forearm with elbow in 90degrees of flexion
- newer reduction technique, hyperpronation with elbow flexion has better success rateand less pain