A Study of Correlation between Shape, Site and Size of Tympamic Membrane Perforation and Its Effect on Hearing
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2018, Vol 17, Issue 4
Abstract
Objective: To analyze the hearing loss in tympanic membrane perforation based on shape, site and size of the perforation. Study design: Prospective hospital based study design Setting: ENT OPD at NSCB Medical College & Hospital (tertiary referral centre) Materials and methods: Patients reporting to ENT OPD with unilateral or bilateral CSOM Safe type were selected between March 2015 and August 2016. The inclusion criteria were of dry central perforation, pure conductive hearing loss and intact ossicular chain. These patients were subjected to Tuning fork tests and pure tone audiometry before and after patch paper test. Results: 54 patients were selected with unilateral or bilateral ear involvement making a total of 70 cases. Maximum patients belonged to low socioeconomic strata and rural areas and were of young adult age group. On the basis of shape, the circular shaped perforations had greater hearing loss (50% having moderate hearing loss) than oval and reniform (62.5% having mild hearing loss) perforations. Hearing loss was more with perforations with both anterior and posterior quadrants involvement (48% having moderate hearing loss). All cases improved in hearing post patch test with irrespective of type of shape, site or size of the perforation. Conclusion: All the three criteria of shape, site and size of perforation have significant relation with hearing loss. All had similar improvement post patch with these three variables. Paper patch test is a simple and reliable indicator of hearing loss improvement in central perforations with intact ossicular chain and can be used as a criterion for selection of patients for type I tympanoplasty.
Authors and Affiliations
Dr. Aparaajita Upadhyay, Dr. Kavita Sachdeva
Keywords
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- EP ID EP373383
- DOI 10.9790/0853-1704135861.
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