Vocal analysis in patients with spasmodic dysphonia before and after treatment with Botulinum toxin A
Análise vocal em pacientes com disfonia espasmódica nos momentos pré e pós tratamento com toxina botulínica A
Ana Cristina Côrtes Gama; Lorena de Almeida Ramos; Andreza Batista Cheloni Vieira; Iara Barreto Bassi; Andréa Alves Maia; Antônio Lobo de Rezende Neto; João Batista de Oliveira; Letícia Neiva de Menezes; Manuel Figueiredo Vila Roel
Abstract
Purpose: to analyze in an objective and subjective manner the voice of patients with spasmodic dysphonia in the moments before and after botulinum toxin A.
Method: the vocal emissions of eleven women patients were recorded before and after (15 days) treatment. The vocal samples were analyzed by two experienced speech therapists through the perceptual analysis (GRBASI scale) and spectrographic analysis.
Results: in the perceptual analysis with subtended vowel, the altered parameters were degree of severity, strain and instability, while in connected speech only degree of severity and strain changed after treatment. In the perceptual analysis with sustained vowel, the parameters that have changed, were the degree of severity, strain and instability, while in connected speech only degree of severity and strain changed after treatment. The spectrographic analysis was improved after treatment with no statistical significance found among the parameters.
Conclusions: there was significant improvement of the vocal analysis after treatment and, therefore, injections of botulinum toxin A were effective in the treatment of spasmodic dysphonia in this group.
Keywords
Resumo
Objetivo: avaliar de forma objetiva e subjetiva a voz de pacientes com disfonia espasmódica nos momentos pré e pós aplicação de toxina botulínica A.
Método: as emissões vocais de onze pacientes do sexo feminino foram registradas antes e após (15 dias) o tratamento. As amostras vocais foram analisadas por duas fonoaudiólogas com experiência em voz por meio da análise perceptivo-auditiva (escala GRBASI) e da análise espectrográfica.
Resultados: na análise perceptivo-auditiva com vogal sustentada os parâmetros que alteraram após o tratamento foram o grau de severidade, tensão e instabilidade, enquanto na fala encadeada foram o grau de severidade e a tensão. Na análise espectrográfica ocorreu melhora do traçado após o tratamento sem significância estatística entre os parâmetros.
Conclusão: ocorreu melhora significante dos aspectos perceptivo-auditivos após o tratamento e, portanto, as injeções de toxina botulínica A mostraram-se eficazes no tratamento da disfonia espasmódica no grupo estudado.
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References
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Submitted date:
06/13/2011
Accepted date:
10/02/2011
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