Publication:

Effect of interlay tympanoplasty on anterior tympanomeatal angle and pure tone audiometry at one month, six month and one year follow up

Background The aim of the study was to determine the effect of interlay tympanoplasty on anterior tympanomeatal angle and on puretone average at 1 month, 6 month and 1 year follow up.

Methods This study was done at department of Otorhinolaryngology, RMRI, Bareilly, India, a tertiary-care Teaching hospital. A total number of 187 patients (86 females, 101 males) were included in this study from April 2014 to March 2018. Age range of selected patients was 15 years to 62 years, 133 patients were having subtotal perforation and remaining having perforation in the anterior half extending upto the annulus.

Results The anterior tympanomeatal angle blunting and pure tone audiometry (PTA) at the due follow up time was assessed and results were analyzed in terms of angle of blunting and hearing loss detected by PTA. Anterior tympanomeatal angle (ATA) blunting was categorized in three groups as follows 120o. Only 3 patients were having >120o ATA after one year and mean hearing loss (air bone gap) was significantly less after 1 year follow up. There were only 3 patients with remnant perforation, after 1 year of surgery out of 187 cases, with 98.4% success rate.

Conclusions Interlay tympanoplasty was significantly effective in repairing anterior and subtotal tympanic membrane perforations with avoidance of blunting at the anterior tympanomeatal angle and achieved good functional results.