Objective:To provide anatomical basis for the amputation of nerval root of brachial plexus at external vertebral canal.
目的：为椎管外臂丛神经根切断术提供解剖学资料。
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Methods 10 patients with a distal fingertip amputation to take root only method of arterial anastomosis replanted. Body in the replanted fingers after the end of a small incision bleeding drainage.