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传统的应用甲状腺下动脉作为识别喉返神经标志,然而存在很多缺点,第一甲状腺下动脉的位置变异很大。Reed氏解剖506例尸体的喉下神经,发现神经和动脉之间有28种不同关系,而且注意到神经的走行可在动脉的前方,后方或在动脉分支之间,其他作者亦证实了此情况。其次喉下神经有时没有喉返支,此畸形约有4～6‰,如有上述情况,常伴有由异常的锁骨下动脉发出的不正常的右侧甲状腺下动
The traditional application of the inferior thyroid artery as the identification of recurrent laryngeal nerve signs, but there are many shortcomings, the location of the first inferior thyroid artery variability is large. Reed’s dissection of 506 cases of the body’s laryngeal nerve found that there are 28 different relationships between nerves and arteries, and noticed that the nerve can move in front of the artery, the posterior or between the arterial branches. Other authors also confirmed this situation . Second, sometimes no hypopharyngeal nerve laryngeal back branch, the deformity of about 4 ~ 6 ‰, if the above situation, often accompanied by abnormal subclavian artery issued by the abnormal right hypothyroidism