Wydawnictwo Medyczne Mediton
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the Polish Society of Audiology and Phoniatrics

 

Original articles

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Clinical applications of wideband tympanometry in children
Michał Kotowski 1/, Beata Pucher 1/, Bartosz Polski 1/, Jakub Sroczyński 1/, Jarosław Szydłowski 1/
  • 1/ Klinika Otolaryngologii Dziecięcej, Szpital Kliniczny im. Karola Jonschera Uniwersytetu Medycznego im. Karola Marcinkowskiego w Poznaniu

Introduction. Wideband tympanometry (WBT) is an impedance audiometry diagnostic tool using wide range of frequencies from 226Hz to 8kHz, with an option to assess middle ear absorbance vs. frequency as well as present different tympanograms: averaged wideband and resonance frequency types. The research carried out up to now suggests that this method may be successfully used for screening of newborns and diagnosing of the following pathologies: fluid in the middle ear, otosclerosis,
ossicular chain discontinuity, flaccid eardrum, dihiscences of the semicircular canals.
Aim. The aim of the study was to assess the clinical usefulness of WBT in the diagnostics and post-surgical follow-up of patients
with chronic otitis media with effusion (COME).
Material and methods. The study group consisted of 12 children with conductive hearing loss and COME confirmed intraoperatively. Audiological assessment comprised distortion product otoacoustic emission, impedance audiometry (226Hz),
pure-tone audiometry (in selected cases) and WBT. All these tests were performed twice: preoperatively and four weeks after surgery. The results were analysed with reference to the clinical usefulness of performing WBT tests in children.
Results. The results of measured absorbance were lower in preoperative tests compared to normative data. Post surgical
assessment revealed elevation of curves in the < 2kHz range in 20 ears. In two cases the absorbance did not improve, and in two other cases the results were not reliable.
Conclusions. WBT seems to be a promising alternative for conventional impedance audiometry in children. Regarding the possibility of performing of non-pressurized absorbance measurements, this method may be used for immediate post-surgical monitoring of the treatment effect.

Otorynolaryngologia vol 14. no 1. Marchpages: from 30to 35
full version