Abstract
Chronic otitis media is a disease developing due to Eustachian tube dysfunction secondary to any insult in nasopharynx which is likely to be bilateral with different stages of disease in both ear. The objective of this study was to examine contralateral ear through otoscopic, radiological and audiological study. Study was conducted between December 2018 and July 2020 in Otorhinolaryngology and Head and Neck Suregery Department. The Contralateral ear was defined as the ear with no tympanic membrane perforation and with no symptoms in patients of unilateral chronic otitis media. Otoscopy, Pure tone audiometry and HRCT temporal bone were done. Results were recorded and analysed. Descriptive stastical analysis was done using SPSS software version 22 of Windows 7. Grade1 pars tensa retraction which is most common abnormal finding in contralateral ear on otoscopy in both unilateral mucosal and squamosal COM patients. On otoscopy of contralateral ear 71.43% squamosal CO M patients were having abnormal tympanic membrane. Hearing loss was seen in 25.71% patients of mucosal COM and 22.9% patients of squamosal COM patients. 17.1% patients of mucosal COM and 20% patients of squamosal COM show mastoid sclerosis of contralateral ear on HRCT temporal bone. Majority of patients with unilateral COM have initial findings of pathogenesis of COM in contalateral ear. These findings in contralateral ear are more common in patients with squamosal COM than patients with mucosal COM
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