The vocal cord abductory excursion varied from 2 mm to 8 mm. The glottic chink increased to 6 mm to 12 mm during inspiration after surgery.

• 轻度外展2例2侧,幅度1~2mm,但声门裂隙达6~12mm,此8例均顺利拔管,发声时声带均有一定幅度的内收。