一般家庭可能都有过这样的经历,即在看护幼儿的过程中,不注意牵拉小儿上肢后出现突发的小儿哭闹,被牵拉的上肢疼痛、拒动,这多是因为桡骨小头脱位而致,出现类似情况,家长不必惊慌。人的前臂(小胳臂)骨骼是由桡骨、尺骨共同构成,桡骨位于前臂外侧,尺骨位于前臂内侧。桡骨的近端,即靠近肘关节的一端称为桡骨小头。桡骨小头周围有韧带包绕,与尺骨近端、上臂的肱骨远端共同构成肘关 The average family may have had such an experience, that is, in the care of young children in the process, do not pay attention to pull the children after the sudden emergence of children crying in the upper limbs, the upper limb pain was pulled pain, refused to move, mostly because of the radial head Dislocation caused, a similar situation, parents need not panic. Human forearm (small arm) bone is composed of radius, ulna together, the radius is located outside the forearm, the ulna is located inside the forearm. The proximal end of the radius, near the end of the elbow, is called the radial head. Radial head surrounded by ligaments, and the proximal ulna, the upper arm of the distal humerus constitute the elbow