CORRELATION OF OSSICULAR CHAIN DEFECTS WITH AUDIOMETRIC PROFILE IN PATIENTS WITH CHRONIC SUPPURATIVE OTITIS MEDIA SQUAMOUS EPITHELIAL TYPE
Journal Title: Journal of Evolution of Medical and Dental Sciences - Year 2017, Vol 6, Issue 92
Abstract
BACKGROUND Chronic suppurative otitis media (CSOM) is a common disease seen in otolaryngology practice. Two clinical types are seen, squamous epithelial and mucosal. The squamous epithelial type is associated with cholesteatoma in the tympanomastoid area. Cholesteatoma has bone eroding properties. This can result in erosion of bony plates surrounding the middle ear and mastoid leading to life-threatening complications. The propensity of ossicular destruction is also higher in patients with cholesteatoma. Pure tone audiometry is used to establish the type and severity of hearing loss. The degree of hearing loss worsens with increased destruction of the tympanic membrane and ossicular chain. Hence, the objective of this study is to evaluate the relationship of ossicular chain defects with the degree of hearing loss in patients with CSOM squamous epithelial type. MATERIALS AND METHODS This is a prospective study conducted from 1st November 2016 to 30th April 2017 on 102 patients, who had CSOM squamous epithelial type. These patients were selected randomly and were examined using otoendoscopy, microscopy and pure tone audiometry preoperatively. During surgery tympanic membrane pathology, ossicular chain status and disease in the middle ear like cholesteatoma and granulations were recorded and analysed. RESULTS Majority of patients ranged between 21 to 30 years with male: female ratio being 1.6: 1. Epitympanic cholesteatoma was the commonest finding. The most frequently eroded ossicle was the Incus (94.1%) with Stapes being eroded in 47.1% of patients. The Malleus was the most resilient ossicle and was eroded in 32.4%. Type A defect was commonest and hearing loss was highest for type D defect with a pure tone average (PTA) of 55.83 db and average air bone gap (ABG) of 39.68 db. CONCLUSION This study defines the status of individual ossicles with the degree of hearing loss in patients with CSOM squamous epithelial type. Malleus was found to be the most resistant ossicle to erosion, whereas the Incus was the most susceptible. Pure tone audiometry gives a broad perspective about the ossicular status and serviceable hearing that can be attained postoperatively
Authors and Affiliations
Praveen Kumar B. Y, Samatha S, Anand Kumar S
Keywords
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- EP ID EP279218
- DOI 10.14260/jemds/2017/1425
- Views 91
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