Purpose: This study is directed towards establishing a correlation between the objective measurement of tympanic membrane (TM) perforation size with hearing loss in patients with inactive mucosal chronic otitis media (COM), and to compare the otoscopic findings of the TM perforation vis-a-vis the results obtained by image analysis of the endoscopic image of the perforation. Materials and methods: An observational, prospective and hospital based study was performed on 107 ears (78 patients) with inactive mucosal chronic otitis media. Objective measurement of the TM perforation size was done by capturing the images of the perforation on ImageJ analysis software. A correlation was established between the hearing loss and the perforation with respect to its size and location. The accuracy of the otoscopic finding of the perforation was established with respect to the endoscopic image of the perforation. Results: The extent of the hearing loss was seen to increase with increasing size of the TM perforation (r = 0.435, p < 0.0001). Posterior perforations had a 12% greater hearing loss than anterior perforations but this was significant only at the frequency of 500 Hz (p = 0.02). There was a positive correlation between the otoscopic estimation of the size of the perforation with the endoscopically obtained image. Conclusion: Hearing loss in chronic otitis media is directly proportional to the size of the TM perforation and posteriorly based perforations have worse audiometric thresholds at lower frequencies (500 Hz).
Purpose: This study explores the changes in hearing thresholds in pregnancy. Materials and Methods: A prospective hospital-based observational study was performed with a total of 69 patients in the age-group of 18 to 40 years. Patients underwent hearing assessment twice during the study period. Conventional pure tone audiometry and impedance audiometry were performed, first during the antepartum period (28-32 weeks of gestational age) and second time during the postpartum period (6 weeks postpartum). Results: Significant difference was seen between the average of air conduction threshold values at speech frequencies when antepartum values were compared with postpartum values. Conclusion: The alterations in hearing sensitivity in pregnant females which improved during the postpartum period can be attributed to pregnancy.
<p class="abstract"><strong>Background: </strong>This study aimed at evaluation of extended high frequency hearing in non operated normal ear in patients undergoing mastoid surgery using otological micro drill.</p><p class="abstract"><strong>Methods:</strong> A hospital based prospective observational study was carried out. Patients up to 40 years of age with unilateral ear disease were recruited and divided into two groups- mastoidectomy group comprising 30 patients who underwent mastoid surgery using high speed microdrill and tympanoplasty group who underwent surgery without using microdrill. Pure tone audiometry (conventional and extended high frequency) was performed preoperatively, on 3rd and 10th postoperative day.</p><p class="abstract"><strong>Results:</strong> In mastoidectomy group, Air conduction thresholds in extended high frequency showed significant changes on 3rd postoperative day and showed recovery by 10th postoperative day. Recovery started by 3rd postoperative day and in majority of cases there was a complete recovery by 10th postoperative day.</p><p class="abstract"><strong>Conclusions: </strong>Otological drilling has a significant effect on the extended high frequency hearing of normal contralateral ear. Extended high frequency audiometry till 16000 Hz is a sensitive modality for evaluation to monitor these cases on post-operative follow up.</p>
<p class="abstract"><strong>Background:</strong> This study aims to check if gestational diabetes mellitus leads to changes in hearing.</p><p class="abstract"><strong>Methods:</strong> A prospective hospital based observational study was performed with total 60 subjects in age group of 18-40 years in the Department of Otolaryngology and Head and Neck Surgery and the Department of Obstetrics and Gynaecology, Lady Hardinge Medical College, New Delhi between November 2016 to March 2018. Subjects were divided in two groups. The first group included 30 pregnant women with diagnosed gestational diabetes mellitus and the second group had 30 pregnant women not having gestational diabetes mellitus. Pure-tone audiometry and impedance audiometry was performed twice in all the subjects, first during the antepartum period and second time during the postpartum period. </p><p class="abstract"><strong>Results:</strong> Significant difference was seen between the average of air conduction threshold values at speech frequencies between the two groups during both antepartum and postpartum period.</p><p class="abstract"><strong>Conclusions:</strong> The alterations in hearing sensitivity in air conduction between the two groups can be attributed to gestational diabetes mellitus.</p>
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