In this prospective study 30

Abstract

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Objectives: To determine the degree and pattern of hearing impairment among patients attending audiology department of a tertiary level hospital. Methods: This was a cross sectional observational study which was carried out in the department of audiology of National Institute of ENT(NIENT) during the period of March 2015 to June 2017. A total number of 8338 patients complaining hearing impairment were included in this study. The clinical diagnosis was established by history, detailed clinical examination including otoscopic examination and all findings were recorded. Hearing assessment was done by different hearing tests according to age and need of patient. Pure Tone Average (PTA) was done on averaging the hearing threshold at 0.5, 1 and 2 kHz. Results: In this study majority of patients (30.1%) were within 25-40 years of age and most of the patients (61.27%) were male. Mild degree of hearing loss was found to have higher prevalence (40.9%) compared to other degrees of hearing losses and more than half (52.5%) of our study population had conductive hearing loss. Conclusion: Mild degree of hearing impairment and conductive type of hearing impairment are more prevalent. Audiological evaluation especially in suspected hearing impaired patient should be a priority. Bangladesh J Otorhinolaryngol; October 2017; 23(2): 115-121

To evaluate the hearing outcome in canal wall down mastoidectomy with middle ear reconstruction, prospective longitudinal study was done at National Institute of ENT, Dhaka from March 2015 to September 2016. Total 22 patients were included in the study undergoing canal wall down mastoidectomy with 6 months postoperative followup. Hearing outcomes were observed and compared with the preoperative hearing tests. Among the 22 patients 9 (39.1% of subjects) patients had hearing gain, 12 (52.2%) had hearing loss and 1 (4.3%) had no change in hearing postoperatively.Although disease clearance is the main objective in canal wall down mastoidectomy, hearing gain can be achieved if combined with ossiculoplasty and tympanoplasty. The hearing gain or loss depends upon the extension of disease and status of the ossicular chain. Most patients usually experience hearing loss more than the preoperative period due to removal of ossicle or ossicles for the sake of disease clearance. Bangladesh J Otorhinolaryngol; October 2017; 23(2): 195-198