Study on impact of duration of tympanic membrane perforation on hearing loss and audiological outcome after surgery

Abstract

<p class="abstract"><strong>Background:</strong> The aim of the study was to assess impact of duration of tympanic membrane perforation on hearing loss and postoperative audiological outcome using pure tone audiogram.</p><p class="abstract"><strong>Methods:</strong> The present study was conducted on 100 patients in department of ENT and HNS, SMGS Hospital, Government Medical College Jammu during a time period of November 2018 to October 2019. All the patients with age 15 to 60 years who presented with tympanic membrane (pars tensa) perforation were included in the study. </p><p class="abstract"><strong>Results:</strong> In our study, mean preoperative hearing loss (AC threshold) of group A was 36.23±1.07 dB and of group B was 25.67±6.38 dB. Group C had mean preoperative hearing loss (AC threshold) of 28.78±6.50 dB. Mean preoperative air-bone gap (AB gap) of group A was 12.9±8.05dB and of group B was 13.86±4.19 dB. Group C had mean preoperative air-bone gap (AB gap) of 16.47±5.51 dB. Postoperatively, pure tone threshold at three months was least in group B (15.09±5.80 dB), followed by group C (15.68±4.66 dB) and group A (19.33±2.81 dB). Whereas, postoperative AB gap at 3 months was least in group C (10±3 dB), followed by group C (8.44±3.59 dB). Group B had maximum postoperative AB gap of 8.49±4.34 dB.</p><p class="abstract"><strong>Conclusions:</strong> This study did not show any correlation between duration of disease and degree of hearing loss.</p>