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Tympanometry in infants: a study of the sensitivity and specificity of 226-Hz and 1,000-Hz probe tones

Michele Picanço Carmo1, Nayara Thais de Oliveira Costa1, Teresa Maria Momensohn-Santos2

  • 1PhD student in Speech-Language Pathology and Audiology, Pontifical Catholic University of São Paulo (PUCSP), São Paulo/SP, Brazil.

International Archives of Otorhinolaryngology
|May 21, 2015
PubMed

Insights

The 1,000-Hz tympanometry test shows higher accuracy in identifying infant middle ear disorders compared to the 226-Hz test. Further research is needed to standardize its use and interpretation in this population.

Area of Science:

  • Audiology
  • Pediatric Medicine
  • Otolaryngology

Background:

  • Middle ear disorders are common in infants.
  • Tympanometry is a key diagnostic tool for middle ear assessment.
  • The 1,000-Hz probe tone is recommended for infants under 6 months due to potentially higher sensitivity.

Purpose of the Study:

  • To systematically review and analyze publications on tympanometry using 226-Hz and 1,000-Hz probe tones.
  • To compare the diagnostic efficacy of different probe tone frequencies in identifying middle ear disorders.

Main Methods:

  • Systematic literature search across multiple electronic databases (SciELO, LILACS, MEDLINE, ISI Web of Knowledge, Scopus).
  • Inclusion and exclusion criteria applied to select relevant studies.
  • Analysis of 14 selected publications.

Main Results:

  • The 1,000-Hz tympanometry demonstrated superior sensitivity and specificity in detecting tympanometric curve changes.
  • A significant number of articles were initially identified, but only a subset met the inclusion criteria for detailed analysis.

Conclusions:

  • The 1,000-Hz probe tone test is more sensitive and specific for diagnosing middle ear abnormalities in infants.
  • Further research is required to address existing uncertainties regarding the 1,000-Hz test, including curve interpretation, standardization of normal criteria, and infant-specific curve types.

Keywords:
acoustic impedance testshearingotitis media with effusionspeech language and hearing sciencesspontaneous otoacoustic emissions

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