Publication: Correlation of hearing impairment with site of tympanic membrane perforation
Files
Date
2005
Authors
Article Type
Original Article
Journal Title
Journal ISSN
ISSN (Print) : 1993-2979 | ISSN (Online) : 1993-2987
Volume Title
Pages
Pages: 2 - 5
Publisher
Institute of Medicine
Abstract
Abstract
Objective: This prospective study was done to assess the level of preoperative hearing impairment in different sites of pars tensa perforation in patients with chronic suppurative otitis media (CSOM) tubo-tympanic type undergoing myringoplasty.
Materials and Methods: A total of 50 patients were recruited from the outpatient Department of Otorhinolaryngology and Head and Neck Surgery from June 2003 to May 2004. Cases of CSOM tubo-tympanic type with dry central perforation, with conductive type of hearing loss were subjected to myringoplasty. Preoperative audiometric evaluations were done. Just prior to operation, examination under microscope was performed. Exact site of perforation was noted. During operation, those found to have ossicular discontinuity or fixation were excluded from this study.
Results: It was observed that the greatest hearing loss was found in big central (45dB) and posterior central (43dB); whereas least in those of anterior central (31dB) and central malleolar (34dB) perforations. The average hearing loss at 500Hz, 1000Hz and 2000Hz was 46.40 dB, 30.90 dB and 31.9 dB respectively. This showed that the hearing loss is maximum at the lowest frequencies and minimum as the frequencies increase.
Conclusion: This study shows that the posterior-central perforations cause more hearing loss than anterior-central ones. The hearing loss is maximum at the lowest frequencies and minimum as the frequencies increase.
Description
C.L Bhusal
Department of Otorhino-Laryngology and Head and Neck Surgery T.U. IOM Kathmandu Nepal.
R.P.S Guragain
Department of Otorhino-Laryngology and Head and Neck Surgery, Tribhuvan University, Institute of Medicine, Maharajgunj Kathmandu, Nepal
RP Shrivastav
Department of Otorhino-Laryngology and Head and Neck Surgery, Tribhuvan University, Institute of Medicine, Maharajgunj Kathmandu, Nepal
Keywords
Identifier
https://doi.org/10.59779/jiomnepal.182