Abstract

Chronic Otitis Media (COM) is the term used to describe any chronic inflammatory pathology of the middle ear cleft without reference to etiology or pathogenesis. High resolution computed tomography (HRCT) the temporal bone provide significant advantages in differentiating between the bone and soft tissue in high contrast images. In this research paper, we have studied the pre-operative HRCT effectiveness in identifying the abnormalities and its aid in tympanomastoid surgery. Methodology: This was a cross sectional study conducted in department of ENT, Indira Gandhi Government General Hospital and Postgraduate Institute, Puducherry from January 2019 to June 2020 with Sample size of 35. Patient diagnosis was made and pre-operative HRCT temporal bone done. Patient was then taken up for surgery and Intra-operative findings noted. Conclusion: In this study which included 35 patients of Chronic Otitis Media attending a tertiary care hospital, the following conclusions made. The mean age of presentation is 36.5 years. Visualization of Tympanic membrane is poor as it was tough to differentiate between Retraction and perforation. The involvement of middle ear identification in HRCT is satisfactory. The ossicles were visualized, even when surrounded soft tissue density. However they cannot be reliable on the scans. The visualization of bony structures (tegmen, LSCC) were high except for the facial canal. This may be misleading due to errors in reconstruction. HRCT couldn’t differentiate between various soft tissue densities.

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