THE ROLE OF HIGH-RESOLUTION MSCT IN THE DIAGNOSIS OF OSSICULAR CHAIN DISORDER TYMPANOSCLEROSIS

Abstract

To review the effectiveness of high-resolution computed tomography in making a diagnosis of tympanosclerosis and its reliability in predicting the postoperative period based on the result of hearing restoration, also based on radiological and surgical data. Methods: A retrospective survey was conducted in diagnostic and treatment institutions, and tympanoplasty was performed for chronic suppurative otitis media (CSOM) 200 ear. In March 2020 and 2021 of the same month, preoperative MSCT images of the temporal bone were reviewed, to verify the prognosis of tympanosclerosis and the integrity of the auditory ossicles. The integrity of the ossicular chain was checked both preoperatively and postoperatively using audiometry (air-bone conduction (ABG)) and the results were assessed: postoperative successful outcome was a tone frequency and sound volume level of 20 dB or less. Results: The study was conducted on 200 ears that underwent tympanoplasty for CSOM, of which 130 out of 200(49%) ears had tympanosclerosis localized in the eardrum, discovered during surgery (tympanoplasty), ears were affected in 41 out of 130 (30, 1%), Incus-malleus ossicular ligament disorders occurred in 19 of 41 ears. 11 ears with a disorder of the stapes bone, and 6 with a disorder of the connection of all three bones. In the remaining 70 cases, a scan of the temporal bone revealed the integrity of all hearing bones and their conductivity. After 6 months, during repeated observation of patients, audiological results of fixation with sensitivity were obtained (95.1%) and specificity (93.8%). Conclusions: Based on the conducted research, it is possible to draw the following conclusion: for otolaryngologists, MSCT in combination with clinical data serves to effectively assess the extent of the lesion, as well as inform for the postoperative prognosis for tympanosclerosis.