Avaliação audiológica em pacientes portadores de hipotireoidismo
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Data
2010-08-01
Autores
Santos, Karlos Thiago Pinheiro dos [UNESP]
Dias, Norimar Hernandes
Mazeto, Gláucia Maria Ferreira da Silva [UNESP]
Carvalho, Lidia Raquel de [UNESP]
Lapate, Renan Luis [UNESP]
Martins, Regina Helena Garcia [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Associação Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial
Resumo
Surdez no hipotireoidismo já foi descrita por diversos autores, porém a fisiopatologia é incerta. OBJETIVOS: Realizar avaliações audiológicas de pacientes com hipotireoidismo adquirido. MATERIAL E MÉTODOS: Grupos de estudo: hipotireoidismo (GH, n-30) e controle (GC, n-30). Parâmetros estudados: gênero, tempo do hipotireoidismo, co-morbidades, sintomas cócleo-vestibulares, exames bioquímicos e hormonais, limiares audiométricos, PEATE e EOAT. RESULTADOS: Todos os participantes eram mulheres; em GH 70% dos pacientes apresentavam tireoidite de Hashimoto e 60% tinham diagnóstico de hipotireoidismo há mais de 5 anos. Depressão e hipertensão foram as principais co-morbidades do grupo GH. Todos os pacientes de GH tinham valores elevados de TSH e 50% deles apresentavam diminuição de T4 livre. Surdez neurossensorial foi detectada em 22 orelhas de GH e em 7 de GC. PEATE mostrou-se normal nos participantes do GC e alterado em 10 orelhas do GH, havendo predomínio do aumento de L-V. EOAT estiveram ausentes em 12 orelhas de GH e em 4 de GC. CONCLUSÕES: Os pacientes com hipotireoidismo apresentaram mais sintomas cócleo-vestibulares, limiares audiométricos mais elevados, prolongamento das latências absolutas de L-V no PEATE e ausência ou redução as amplitudes das emissões otoacústicas. Tais alterações não estavam associadas aos níveis de TSH e T4 livre.
Hearing loss in hypothyroidism has been reported by many authors but its pathophysiology is unclear. AIMS: to study the audiological evaluation of patients with acquired hypothyroidism. MATERIALS and METHODS: two groups were included: a hypothyroidism group (HG, n-30), and a control group (CG, n-30). Parameters studied: gender, time of hypothyroidism, comorbidities, cochleovestibular symptoms, biochemistry and hormonal exams (TSH, T4), tonal audiometry, TOAEs and BERA. RESULTS: all participants were women, 70% of the HG had Hashimoto thyroiditis, 60% of the HG had had the diagnostic of the hypothyroidism for at least five years. Depression and hypertension were frequent in HG. All HG patients had altered TSH values and 50% had diminished T4 values. Sensorineural hearing loss was detected in 22 ears from the HG and in seven from the CG. BERA was normal in the CG and altered in 10 ears from the HG, showing L-V increase. TOAEs were absent in 12 ears from the HG and in four from the CG. CONCLUSIONS: HG patients had more cochleovestibular symptoms, higher audiometric thresholds, increase in L-V in the BERA and absence or reduction in TOAEs amplitudes. Such alterations were not associated with THS and free T4 levels.
Hearing loss in hypothyroidism has been reported by many authors but its pathophysiology is unclear. AIMS: to study the audiological evaluation of patients with acquired hypothyroidism. MATERIALS and METHODS: two groups were included: a hypothyroidism group (HG, n-30), and a control group (CG, n-30). Parameters studied: gender, time of hypothyroidism, comorbidities, cochleovestibular symptoms, biochemistry and hormonal exams (TSH, T4), tonal audiometry, TOAEs and BERA. RESULTS: all participants were women, 70% of the HG had Hashimoto thyroiditis, 60% of the HG had had the diagnostic of the hypothyroidism for at least five years. Depression and hypertension were frequent in HG. All HG patients had altered TSH values and 50% had diminished T4 values. Sensorineural hearing loss was detected in 22 ears from the HG and in seven from the CG. BERA was normal in the CG and altered in 10 ears from the HG, showing L-V increase. TOAEs were absent in 12 ears from the HG and in four from the CG. CONCLUSIONS: HG patients had more cochleovestibular symptoms, higher audiometric thresholds, increase in L-V in the BERA and absence or reduction in TOAEs amplitudes. Such alterations were not associated with THS and free T4 levels.
Descrição
Palavras-chave
audiometria, hipotireoidismo, potenciais evocados auditivos do tronco encefálico, surdez, audiometry, hypothyroidism, audiometry, hearing loss
Como citar
Brazilian Journal of Otorhinolaryngology. Associação Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial, v. 76, n. 4, p. 478-484, 2010.