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KMID : 0361020140570120821
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Korean Journal of Otolaryngology - Head and Neck Surgery
2014 Volume.57 No. 12 p.821 ~ p.825
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Clinical Characteristics of Bilateral Chronic Otitis Media
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Kim Ji-Sung
Park Soo-Kyoung
Park Jae-Hong
Lee Dong-Wook
Choi Young-Seok
Shin See-Ok
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Abstract
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Background and Objectives: The purpose of this study was to determine the prevalence of bilateral chronic otitis media (BCOM) and the ratio of unilateral or bilateral cholesteatoma in BCOM. Pre- and post-operative hearing were analyzed to see if bilateral balanced hearing were achieved.
Subjects and Method: A retrospective review was done with a computerized otologic database to identify all patients who underwent surgical treatments for COM between 1998 and 2011, and has a follow up duration for at least 6 months. Comparative analysis between pre- and post-operation hearing was measured by pure tone audiometry and achievement of bilateral balanced hearing was analyzed with ’The Belfast rule of thumb’.
Results: Two hundred and eighty-one (14.5%) of 1938 patients suffered from BCOM, and of these, 73 (25.9%) of the patients with BCOM had cholesteatomas in one (12.4%) or both ears (13.5%). When a patient with BCOM is found with cholesteatoma in one ear, the odds of there being cholesteatoma in the other ear was 52.1%. According to ’The Belfast rule of thumb’, it is considered difficult to achieve successful bilateral hearing gains sufficient for the patients to perceive subjective hearing improvements in BCOM.
Conclusion: Approximately 15% of the COM patients were found with the disease in both ears, and the odds of a patient with BCOM having cholesteatoma in one ear also having cholesteatoma in the other ear was 53.4%. It was difficult to achieve subjective, successful and balanced bilateral hearing gain with three-dimensional hearing improvements.
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KEYWORD
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Cholesteatoma, Middle ear, Otitis media
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