The average of the length of superior laryngeal artery in both left and right sides was 23.1 mm,23.6 mm respectively; the mean value of the start bore was 1.6 mm,1.5 mm; the entering point of bore was 1.4 mm,1.3 mm.

• 左右侧喉上动脉的长度平均值分别为23.；1，21