Wideband tympanometry findings in inner ear malformations

• Published in: Auris, nasus, larynx nasus, larynx, 2020-04, Vol.47 (2), p.220-226
• Main Authors: Kaya, Şule, Çiçek Çınar, Betül, Özbal Batuk, Merve, Özgen, Burçe, Sennaroğlu, Gonca, Genç, Gülsüm Aydan, Sennaroğlu, Levent
• Format: Article
• Language: English
• Subjects: Absorbance; Acoustic Impedance Tests; Adolescent; Adult; Child; Child, Preschool; Cochlea - abnormalities; Cochlea - physiopathology; Ear Diseases - congenital; Ear Diseases - physiopathology; Ear, Inner - abnormalities; Ear, Inner - physiopathology; Female; Humans; Inner ear malformations; Male; Wideband tympanometry; Young Adult
• ISSN: 0385-8146; 1879-1476
• DOI: 10.1016/j.anl.2019.09.001

The deficits in the cochlea which is at the one end of the ear sound transfer system, may effect middle ear functions. Wideband typanometry (WBT) is frequently used to evaluate these transfer functions which play a crucial role in setting the impedance matching between the external ear and the cochlea. To this end, the aim of this study was to investigate the ear transfer functions in inner ear malformations via WBT, and to question whether these functions change depending on the types of inner ear malformation. This prospective case-control study was conducted in a university hospital. One hundered-fifty-seven ears (aged 3–37 years) under the groups of cochlear hypoplasia, incomplete partition I, incomplete partition II, cochlear aplasia and complete labyrinthine aplasia were evaluated. In the control group, 30 ears with normal hearing were enrolled and WBT was carried out. Tympanometric peak pressure, equivalent middle ear volume, static admittance, tympanogram width, resonance frequency, average wideband tympanometry and absorbance measurements were analyzed. The inner ear malformation groups demonstrated statistically significant differences than the control group and from each other in terms of traditional tympanometric parameters and WBT test parameters (p