Navegando por Palavras-chave "nervo laríngeo superior"

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    Aspectos histomorfométricos do nervo laríngeo superior
    (ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2002-03-01) Tiago, Romualdo Suzano Louzeiro [UNIFESP]; Munhoz, Mário Sérgio Lei [UNIFESP]; Faria, Flavio Paulo de [UNIFESP]; Guilherme, Arnaldo [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Introduction: The larynx plays a primal role in the maintenance of life. The perfect integration between its afferent and efferent pathways, provided by the superior laryngeal nerve (SLN) and by recurrent laryngeal nerve, avoids foreign body aspiration and maintains the intrinsic laryngeal muscle tone by means of the reflexes elicited by the mucus wave movements. Aspirations and pneumonias as well as dysphonias, more frequently found among the elderly, might be triggered by disorders affecting these same neural pathways. Aim: The aim of this study was to assess the histomorphometryc characteristics of the SLN in elderly subjects in comparison to adults. Materials and method: A fragment of each side of the superior laryngeal nerve was obtained during necropsy examination and two different age groups were gathered. One group was made up of 5 adult subjects averaging 39,6 years of age and one was constituted of 6 elderly subjects averaging 71,7 years of age. The material was examined in a 40x objective lens microscope, connected to a computerized image analyzing system and the nerve s main parameters as the myelinated fibers frequency, fiber density per mm2, and intraperineural area were found. Results: A statistically significant reduction of the smaller myelinated fibers (1 and 2 mm) was observed in the Elderly group. No difference was noted in the myelinated fiber frequency of the left/right sides. Conclusion: Being the low diameter superior laryngeal nerve myelinated fibers functionally responsible for the reflex of glotic closure, their reduction in the elderly subjects may be related, alongside with other factors, to a greater predisposition to aspiration and voice disorders.
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    Identificação do ramo externo do nervo laríngeo superior na tireoidectomia minimamente invasivo vídeo-assistida
    (ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2005-06-01) Dedivitis, Rogério Aparecido [UNIFESP]; Guimarães, André V.; Universidade Federal de São Paulo (UNIFESP); Universidade Metropolitana de Santos
    The minimally invasive video-assisted thyroidectomy (MIVAT) without gas infusion is considered safe and has advantages in terms of cosmetic results compared to the conventional approach. AIM: to present our findings regarding the identification of the external branch of the superior laryngeal nerve (EBSLN) during MIVAT. STUDY DESIGN: Transversal cohort study. MATERIAL AND METHOD: twelve patients underwent hemithyroidectomy for thyroid nodular disease through MIVAT method. The upper pedicle of the thyroid was dissected under the magnified view at 0-degree five-millimeter endoscope in order to achieve the identification of EBSLN in all cases. RESULTS: We identified 10 (83.3%) EBSLN out of 12 cases. The nerve ran medially to the branches of the superior thyroid artery in 8 cases (80%) and crossed anteriorly in 2 (20%). CONCLUSIONS: We identified the EBSLN in 83.3% of the cases, whose course was medial to the branches of the superior thyroid artery in 80% and crossing anteriorly in 20%. The ligation of the upper pedicle of the thyroid can be performed under direct view of the EBSLN.