双侧声带外展常威胁生命,可窒息而死。但又常易被忽视。因为除有一个顽固的、柔软的喉鸣音以外,声音(或哭声)可以完全正常。至少比一侧声带麻痹者好,因为双侧声带往往还保留少许微弱的内收功能,因此在呼气或发声时,声带还会被动的、相等的振动。而一侧麻痹者,双 Bilateral vocal abduction often threatens life and can suffocate. But often overlooked. Because sound (or cries) can be perfectly normal except with a stubborn, soft throat ring. At least better than vocal cord paralysis on one side, because the bilateral vocal cords tend to retain a little weak adduction, so the vocal cords are also passively and equally vibrated when exhaled or vocalized. One side of paralysis, double