title: High frequency tympanometry in neonates with normal otoacoustic emissions: measurements and interpretations.
abstract: Tympanometry is used in evaluating middle ear functional conditions. Before 6 months of age its results may be misleading. High-frequency studies aim to provide more valid procedures. In this study, 236 healthy newborns (127 male, 109 female; 73 % rural, 27 % urban) with age between 0 and 42 days (mean 27 days) no risk for hearing impairment; were analyzed for DPOAE. 209 babies who passed DPOAE were further analyzed for high-frequency tympanometry using Interacoustic AT235h tympanometer, which was possible for 399 ears. The success rate for HFT was 95.3 %. Descriptive statistics for six parameters TPP, Y 200, Y peak, Y tail, YpC-200 and Ypc-tail were analyzed and compared with previous studies. All the parameters except the Ypc-tail were in the range of previous studies.
authors.affiliation: Department of ENT, Sri Guru Ram Das Institute of Medical Sciences & Research (SGRDIMSR), Mehta Road, Amritsar, India.
authors.forename: Arvinder Singh
authors.initials: AS
authors.lastname: Sood
authors.affiliation: Department of ENT, Sri Guru Ram Das Institute of Medical Sciences & Research (SGRDIMSR), Mehta Road, Amritsar, India.
authors.forename: Charanjit Singh
authors.initials: CS
authors.lastname: Bons
authors.affiliation: Department of Pediatrics, Sri Guru Ram Das Institute of Medical Sciences & Research (SGRDIMSR), Mehta Road, Amritsar, India.
authors.forename: Gursharan Singh
authors.initials: GS
authors.lastname: Narang
keywords: Admittance; DPOAE; High-frequency tympanometry (HFT); Peak pressure