小儿“肘错环”,又叫“肘脱环”,医学上称为“桡骨小头半脱位”,或称“牵拉肘”。多见于5岁以下的幼儿,尤其是1～3岁的孩子。是家庭中经常遇到的一种小儿肘部损伤性疾患,且患儿易反复发生,不加保护还会形成习惯性肘脱位。 肘错环的发生是由于肘部受到过力纵向牵拉所致。如在穿衣、脱衣,或玩耍、跌倒时患儿肘在伸直位时,被人牵拉前臂,纵向用力提拉造成。患儿发病后,因肘部疼痛而哭闹,患肢不敢活动,害怕别人触动。患侧可出现耸肩,肘关节呈半屈曲或伸直,前臂旋前而紧贴胸部,不敢旋向后侧,不能抬臂与曲肘,勉强取物时肘关节也不能自由活动,被动牵拉前臂或屈曲肘关节 Pediatric “elbow wrong ring”, also known as “elbow off the ring,” medically known as “radial head subluxation,” or “pull the elbow.” More common in children under 5 years of age, especially 1 to 3 years old children. Is often encountered in the family a pediatric elbow injury, and children prone to recurrent, unprotected will form a habitual elbow dislocation. Elbow fault occurs because the elbow is pulled by the longitudinal force. As in the dressing, undressing, or playing, falling elbow in the extension position, was pulled forearm, the vertical pulling force caused. After the onset of children, because of elbow pain and crying, limbs dare not activity, afraid of others touch. Ipsilateral shrugs may appear, the elbow was semi-flexion or straight, forearm pronation and close to the chest, afraid to spin to the back, can not lift the arm and the elbow, barely take things when the elbow can not move freely, passive Pull the forearm or flex the elbow