Wideband absorbance pattern in adults with otosclerosis and ossicular chain discontinuity |
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| Authors: | Arunraj Karuppannan Animesh Barman |
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| Institution: | 1. Department of Audiology/Prevention of Communication Disorders, All India Institute of Speech and Hearing, Manasagangothri, Mysuru, Karnataka, India;2. Department of Audiology, All India Institute of Speech and Hearing, Manasagangothri, Mysuru, Karnataka, India;1. Sen-En Rifu Otological Surgery Center, Miyagi, Japan;2. Department of Otolaryngology-Head and Neck Surgery, Tohoku University School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan;3. Department of Mechanical Engineering and Intelligent Systems, Tohoku Gakuin University, Sendai, Japan;4. Department of Intelligent Information Systems, Tohoku Bunka Gakuen University, Sendai, Japan;1. Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan;2. Department of Otorhinolaryngology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan;3. Department of Radiology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan;4. Department of Radiology, University of Michigan, 1500 E Medical Center Dr, UH B2, Ann Arbor, MI 48109, USA;5. Department of Otolaryngology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511, Japan;1. Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan;2. Center for Head and Neck Surgery, Kusatsu General Hospital, Shiga, Japan;1. University of Health Sciences, Faculty of Health Sciences, Department of Audiology, Istanbul, Turkey;2. Istanbul Aydin University, Faculty of Health Sciences, Department of Audiology, Istanbul, Turkey;1. Department of Plastic and Reconstructive Surgery, Kyushu University Hospital, 1-1, 3-chome, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan;2. Department of Otorhinolaryngology, Graduate School of Medical Science of Kyushu University, Fukuoka, Japan;1. Department of Otorhinolaryngology, University of Health Science Turkey, Gülhane Traning and Research Hospital, Ankara, Turkey;2. Department of Audiology, University of Health Science Turkey, Gülhane Faculty of Health Science, Ankara, Turkey;3. Department of Otorhinolaryngology, University of Health Science Turkey, Gülhane Faculty of Medicine, Ankara, Turkey |
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| Abstract: | ObjectivesEvidence from previous literature had shown that the use of a single frequency probe tone is not sensitive enough to detect middle ear pathologies, especially related to the ossicles, which hinders accurate diagnosis. The goal of the present study was to compare the outcome of wideband absorbance (WBA) tympanometry and to determine the difference in WBA pattern in adults with otosclerosis and ossicular chain discontinuity.Materials and methodsEstimated adult cases of otosclerosis (10 ears) and ossicular chain discontinuity (06 ears) along with healthy individuals (10 ears) in the age range of 24 to 48 years (mean age: 38.6 years) were considered for the study. WBA was measured at peak and ambient pressure along with resonance frequency and compared with the data obtained from the healthy individuals to determine the WBA pattern.ResultsData analysis revealed a distinct WBA pattern showing high absorbance at 750 Hz for ossicular chain discontinuity compared to healthy individuals, whereas the otosclerosis group showed reduced absorbance (p < 0.05) at low frequencies (250 Hz to 1500 Hz). WBA measured at the peak and ambient pressure did not elicit any significant difference across the frequencies. Also, the average WBA tympanogram measured between 375 Hz and 2000 Hz showed a significant difference in ambient pressure only in the otosclerosis group. In comparison to healthy individuals (901 Hz), ossicular chain discontinuity showed a significant reduction in resonance frequency (674 Hz), whereas in cases with otosclerosis had higher resonance frequency (1445 Hz).Conclusions and significanceThe present study showed different WBA patterns between the groups and the absorbance values were significantly different at the low frequencies. This suggests that WBA has the potential to differentiate ossicles related pathologies from normal and also between the ear with otosclerosis and ossicular chain discontinuity. |
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