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Nursemaid's elbow, babysitter's elbow, or pulled elbow is a dislocation of the elbow joint caused by a sudden pull on the extended pronated forearm, such as by an adult tugging on an uncooperative child or by swinging the child by the arms during play. The technical term for the injury is radial head subluxation. ==Overview== In radial head subluxation, there is little complaint of pain, and the patient generally reports pain in the proximal forearm. Radial head subluxation is a common pediatric presentation generally occurring between the ages of 1 and 3 years, although it can happen anytime between 6 months of age and 7 years. After age 3, children's joints and ligaments gradually grow stronger, making radial head subluxation less likely to occur. The etiology is slippage of the head of the radius under the annular ligament. The distal attachment of the annular ligament covering the radial head is weaker in children than in adults, allowing it to be more easily torn. The older child will usually point to the dorsal aspect of the proximal forearm when asked where it hurts. This may mislead one to suspect a buckle fracture of the proximal radius. There is no tear in the soft tissue (probably due to the pliability of young connective tissues).〔 This injury has also been reported in infants younger than six months and in older children up to the preteen years. There is a slight predilection for this injury to occur in girls and in the left arm. The classic mechanism of injury is longitudinal traction on the arm with the wrist in pronation, as occurs when the child is lifted up by the wrist. There is no support for the common assumption that a relatively small head of the radius as compared to the neck of the radius predisposes the young to this injury. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nursemaid's elbow」の詳細全文を読む スポンサード リンク
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