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Updated: Aug 24, 2026
Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
Published on: January 25, 2016
Correlation of CT analysis and audiometry in Japanese otosclerosis
Kensuke Kiyomizu1, Tetsuya Tono, Dewen Yang
1Department of Otorhinolaryngology, Miyazaki Medical College, University of Miyazaki, 5200 Kihara Kiyotake, Miyazaki 889-1692, Japan. kiyochan@fc.miyazaki-u.ac.jp
Objective:
To determine the extent of audiometric correlation with CT findings.
Methods:
Forty-four patients (82 ears) with surgically confirmed otosclerosis underwent preoperative CT examination. Based on the computed tomography (CT) findings, the ears were classified into five groups as follows: Group A, the group with no pathological CT findings; Group B1, the group with demineralization localized in the region of the fissula antefenestram; Group B2, the group with demineralization extending towards the cochleariform process from the anterior region of the oval window; Group B3, the group with extensive demineralization surrounding the cochlea; and Group C, the group with thick anterior and posterior calcified plaques.
Results:
There were 32 ears (39.0%) in Group A, 21 ears (25.6%) in Group B1, 16 ears (19.5%) in Group B2, 7 ears (8.5%) in Group B3, and 6 ears (7.3%) in Group C. The mean bone conduction levels were greater in the order of the extent of demineralization: Groups A, B1-B3 suggesting positive relationship between the cochlear function and the degree of labyrhinthine otosclerosis.
Conclusion:
A good correlation between the preoperative CT findings and audiometry findings suggests that CT with a slice intervals between 0.5 and 1mm could provide useful informations in assuming the extent of otosclerosis in the inner ear.
