Comparison between pharyngeal flap surgery and sphincteroplasty: nasometric and aerodynamic analysis
Comparação entre cirurgia do retalho faríngeo e esfincteroplastia: análise nasométrica e aerodinâmica
Renata Paciello Yamashita; Carla Aparecida Curiel; Ana Paula Fukushiro; Maria Natália Leite de Medeiros; Inge Elly Kiemle Trindade
Abstract
Purpose: to compare the effect of pharyngeal flap surgery and sphincteroplasty on hypernasality and velopharyngeal closure in the velopharyngeal insufficiency management, by means of instrumental assessment.
Methods: thirty patients with repaired cleft palate±lip, submitted to surgical treatment for velopharyngeal insufficiency (15 pharyngeal flap and 15 sphincteroplasty) were evaluated before and, at least, 1 year after surgery. Hypernasality was estimated by means of nasalance scores (acoustic correlate of nasality) obtained by nasometry considering a cutoff score of 27%. Velopharyngeal closure was determined by the velopharyngeal area measurement. Nasalance scores were obtained by nasometry, during the reading of a set of 5 sentences containing exclusively oral sounds, considering the cutoff value of 27%. Velopharyngeal area was provided by the measurement of velopharyngeal area by means of pressure-flow technique and was classified as: 0 to 4.9 mm2=adequate; 5 to 19.9 mm2=borderline and ≥20mm2 inadequate. Differences between the two techniques were accepted as significant when p < 0.05.
Results: before surgery nasalance mean scores were 43±8.4% and 45±14.2% and velopharyngeal area mean were 51±35.4mm2 and 69±29.2mm2 for the pharyngeal flap and sphincteroplasty groups, respectively. After surgery, nasalance mean scores were 27±10.1% and 31±14.2% and velopharyngeal area mean were 3.6±5.5mm2 and 24±32.7mm2 for the pharyngeal flap and sphincteroplasty groups, respectively. The reduction of the nasalance scores and velopharyngeal area was statistically significant in both groups.
Conclusion: these results suggest that pharyngeal flap was shown to be more efficient than sphincteroplasty in the elimination of hypernasality and adequacy of velopharyngeal closure in the patients studied.
Keywords
Resumo
Objetivo: comparar o efeito do retalho faríngeo e da esfincteroplastia sobre a hipernasalidade da fala e o fechamento velofaríngeo no tratamento de indivíduos com insuficiência velofaríngea residual, por meio de avaliação instrumental.
Métodos: foram avaliados 30 pacientes, com fissura de palato±lábio reparada, submetidos à correção cirúrgica da insuficiência velofaríngea (15 com retalho faríngeo e 15 com esfincteroplastia), avaliados antes e, no mínimo, 1 ano após a cirurgia. A hipernasalidade foi estimada a partir dos escores de nasalância (correlato físico da nasalidade) obtidos por meio da nasometria, durante a leitura de 5 sentenças contendo, exclusivamente, sons orais, considerando como limite de normalidade o escore de 27%. O fechamento velofaríngeo foi aferido a partir da medida da área velofaríngea obtida por meio da técnica fluxo-pressão e foi classificado em: 0-4,9mm2=adequado; 5-19,9mm2=marginal e, >20mm2=inadequado. Diferenças entre as duas técnicas foram consideradas estatisticamente significantes ao nível de 5%.
Resultados: antes da cirurgia, os valores médios de nasalância foram de 43±8,4% e 45±14,2% e de área velofaríngea foram 51±35,4mm2, e 69±29,2mm2, para os grupos retalho faríngeo e esfincteroplastia, respectivamente. Após a cirurgia, os valores médios de nasalância reduziram para 27±10,1% e 31±14,2% e de área velofaríngea para 3,6±5,5mm2 e 24±32,7mm2 para os grupos retalho faríngeo e esfincteroplastia, respectivamente. A redução dos valores de nasalância e área velofaríngea foi estatisticamente significante nos dois grupos.
Conclusão: estes resultados sugerem que o retalho faríngeo foi mais eficiente do que a esfincteroplastia na eliminação da hipernasalidade e adequação do fechamento velofaríngeo nos pacientes estudados.
Palavras-chave
Referencias
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Submitted date:
05/08/2014
Accepted date:
18/09/2014
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