1. The operation mainly used epineurium-epineurium coaptation, neuroma-epineurium coaptation and epineurium-tissue coaptation respectively.Therefore, the ruptured nerves were sutured without tension.
   分别采用外膜-外膜法、神经瘤外膜-外膜法、外膜-组织床法等3种方法，使神经断端在无张力下缝合。

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