Audiological and Radiological Characteristics in Incomplete Partition Malformations
Department of Audiology, Hacettepe University, Ankara, Turkey
Department of Radiology, Hacettepe University, Ankara, Turkey
Department of Otorhinolaryngology, Hacettepe University, Ankara, Turkey
J Int Adv Otol ; : -
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Key Words: Incomplete partition, inner ear malformation, hearing loss, radiological evaluation, air bone gap.
Objectives: To compare the audiological and radiological findings of the patients with incomplete partition malformations (IPs) and analyze the relationship between the audiological and radiological findings.
Materials and Methods: The study included 84 patients (168 ears) with IPs as follows: 26 patients with IP-I (41 ears), 54 patients with IP-II (108 ears), and 4 patients with IP-III (8 ears). Air and bone conduction thresholds were determined with pure tone audiometry and air bone gap was recorded in all patients with IPs. Magnetic resonance imaging studies and computerized tomography scans of the temporal bones were analyzed using the PACS system of our university.
Results: It was found out that all ears with IP-I were diagnosed with severe to profound hearing loss. The degree of the hearing loss varied from mild to severe/profound in patients with IP-II. Severe to profound mixed hearing loss (MHL) was determined in all ears with IP-III. Air bone gap was larger in lower frequencies in IP-II cases diagnosed with MHL. There was not significantly difference between air bone gap and the size of the vestibular aqueduct in ears with IP-II (p>0,05).
Conclusion: Each type of IPs has different audiological findings. Depending on the type and degree of the hearing loss, it is possible to choose the appropriate audiological intervention. Patients with IPs should be evaluated according to the type of the malformation.