上肢骨折与关节损伤Mechanism 损伤机制损伤机制vMostly IndirectvCommonly described as“a fall on outstretched hand“vType of injury depends on position of the upper limb at the time of impact:Flexed屈曲,Extended伸直,Adducted内收,Abducted外展,Pronated旋前 or Supinated旋后Fracture of the Clavicle 锁骨骨折锁骨骨折vCommon especially in children and elderlyvCommonest site is the middle one thirdvMainly due to indirect injuryvDirect injury leads to comminuted TreatmentvConservative by an arm sling手臂吊带 or eight bandage 八字绷带vOperative fixation