MEDIDAS DE IMITÂNCIA ACÚSTICA EM NEONATOS

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The aim of this study was to investigate the tympanometric patterns and the occurrence of acoustic reflex with two probe tones: 226 Hz e 1000 Hz. The research composed of 38 full-term newborns, 23 male and 15 female, between 40 and 83 hours, without history of pre, peri or posnatal problems and without hearing loss indicators. The audiological procedures were: initial interview, visual inspection of the external ear canal, Transient Evoked Otoacoustic Emissions, tympanometry and acoustic reflex measurement in two protocols: screening and threshold researching with probe tones of 226 Hz and 1000 Hz. The results showed a statistically significant difference between both probe tones in the tympanometric peak pressure, static admittance and ear canal volume. When comparing the acoustic reflex, it was verified more occurrence to 1000 Hz probe tone in all activators used for both protocols. We concluded that the tympanometric pattern for both probe tones were usually characterized by single and double peaks; for 1000 Hz probe tone there were a higher number of tympanometric widths with single peaks, while for 226 Hz probe tone, there were a higher number of tympanograms with double peaks. For the acoustic reflex, we verified a higher occurrence of responses when 1000 Hz probe tone was used for both protocols.

ASSUNTO(S)

timpanometria fonoaudiologia reflexo acústico neonate tympanometry acoustic impedance tests middle ear neonato acoustic reflex testes de impedância acústica orelha média

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