喉頭神経損傷に関する手術解剖学的研究甲状腺と反回神経との関係について

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Fourty-seven adult cadaver larynges with thyroid glands were dissected under a binocular microscope, in order to illustrate the extralaryngeal division of the recurrent laryngeal nerve and its relation to the thyroid gland and the inferior thyroid artery.Results were summarized as followes:(1) The recurrent laryngeal nerves, in all cases except one, were divided prior to arriving the lower margin of the cricopharyngeal muscle where the nerve enteredinto the larynx. A type of two divisions was of and in 67% of examined 94 nerves, three divisions in 27% and four in 5%. In most cases the site of the division was within 1.5cm below the lower margin of the cricopharyngeal muscle.(2) In any type of the nerve division the anterior branch always consisted of motor fibers and the posterior branch was composed of sensory fibers which joined with a branch of the superior laryngeal nerve and composed Galen's anastomosis. When the nerve was divided into three branches, the middle branch was in many cases a motor nerve which innervated the adbuctor muscle, and occationally it was found a sensory one. In cases which the nerve was divided into four branches, the antero-mediate branch was a motor nerve which innervated the abductor muscle and the posteromediate was a sensory one.(3) The recurrent lanryngeal nerve was found to run adjacent to the thyroid gland in 83% of all cases and apart from the gland in only 17%. In most cases the recurrent laryngeal nerve was in the close position to the lower two thirds of the thyroid gland.(4) The recurrent layngeal nerve was situated anteriorly to the inferior thyroid artery in 12% of all cases and posteriorly in 21%. In 67% of cases, the nerve ran between branches of the artery and was drawn nearer to the thyroid gland.
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喉頭神経損傷に関する手術解剖学的研究甲状腺と反回神経との関係について

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喉頭神経損傷に関する手術解剖学的研究 甲状腺と反回神経との関係について

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喉頭神経損傷に関する手術解剖学的研究甲状腺と反回神経との関係について