JOURNAL OF SHANDONG UNIVERSITY (OTOLARYNGOLOGY AND OPHTHALMOLOGY)

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Clinical guidelines for usage of 226- and 1,000-Hz tympanometry in
normal neonates

YANG Kun1, LIU Zhi-qi2, HUANG Zhi-wu1   

  1. 1. Department of Otolaryngology-Head & Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China；
    2. Department of Otolaryngology, Hubei Provincial Women and Children Hospital, Wuhan 430070, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-10-16 Published:2008-10-16
  • Contact: HUANG Zhi-wu

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Abstract: To evaluate the clinical characteristics of tympanograms using 226- and 1,000-Hz probe frequencies and to provide a clinical guideline. MethodsHearing of all subjects was screened by means of transient-evoked otoacoustic emissions. Tympanograms, recorded with probe-tone frequencies of 226- and 1,000-Hz, were classified based on the Liden/Jerger model of shapes. Furthermore, equivalent ear canal volume, tympanometric peak pressure and other important tympanometric parameters were calculated for each tympanogram. ResultsBoth ears of the 100 neonates passed the TEOAE Screening. Most tympanograms obtained from the 226 Hz tympanometric data were double-peaked (96.0%). The 1000Hz tympanometric data obtained showed a single - peaked tympangram in 180 ears (90.0%). 174 (87.0%) ears were either double-peaked in 226Hz tympanogram or single-peaked in 1000Hz. 6 ears had a single peak both in 226Hz and in 1,000Hz tympanogram. ConclusionThese results have led to the successful implementation of 1,000-Hz tympanometry in neonatal hearing assessment.

Key words: Neonate, Hearing screening, Tympanometry, Ear, middle

CLC Number: 

  • R764.04
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