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Surgical approach to the thyroarytenoid branch of the inferior laryngeal nerve through the thyroid cartilage

Sperandio, Fabiana Araújo; Imamura, Rui; Tsuji, Domingos Hiroshi; Sennes, Luiz Ubirajara.
Acta cir. bras.; 31(7): 442-447, July 2016. tab, ilus
Artigo em Inglês | VETINDEX-Express | ID: vti-21027

Resumo

PURPOSE:To describe the anatomical course of the intralaryngeal portion of the inferior laryngeal nerve (ILN) and to standardize the surgical access to its thyroarytenoid branch (TAb) through the thyroid cartilage.METHODS:Under surgical microscopy, 33 adult human excised larynges were dissected, to expose the intralaryngeal portion of ILN. The point of entry of TAb, ILN's terminal branch, in the thyroarytenoid (TA) muscle was determined and correlated with thyroid cartilage dimensions.RESULTS:After entering the larynx, the ILN consistently traveled between the thyroid cartilage and the lateral cricoarytenoid muscle in an anterior and slightly cranial course. The distance from the point of entry of the TAb in the TA muscle to the midline (TAb-H) and to the inferior border (TAb-V) of the thyroid cartilage differed according to gender. In females, mean distances of TAb-H and TAb-V were 20.5mm and 5.2mm and in males, 22.3mm and 5.9mm, respectively.CONCLUSION:The intralaryngeal course of the inferior laryngeal nerve presents low variability and measures from landmarks in the thyroid cartilage help to estimate the point of entry of thyroarytenoid branch in thyroarytenoid muscle.(AU)
Biblioteca responsável: BR68.1
Localização: BR68.1