The arm should neer be tied aboe the head in abduction and external rotation while a body cast is applied because this position may cause a brachial plexus paralysis.

 
  • 在进行躯干石膏固定时上臂绝不能在外展外旋位捆绑至高于头的水平,因这一位置可导致臂丛神经麻痹。
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