فهرست نشریات علمی دسترسی آزاد ایران

Background: The incidence of fistulas found during the surgery for chronic otitis media with cholesteatoma hasbeen reported in a wide range in different geographical areas. This study aims to find the prevalence of labyrinthinefistula in the south of Iran.Methods: A prospective cross sectional study of 787 (504 ears belong to 462 patients) consecutive tympanoplastywith or without mastoidectomy for chronic otitis media was performed. Data on preoperative clinical andpreoperative and postoperative hearing status and intraoperative findings were analyzed.Results: A labyrinthine fistula was found at surgery in 24 (4.7%) ears of the total 504 ears belonging to 462patients undergoing surgery for chronic otitis media. Location of the fistula was the lateral semicircular canal in23, posterior semicircular canal in 1 and promontory in 1 subject. There was a statistically significant difference inpreoperative and postoperative AC threshold in 500-3000 Hz frequency and ABG 500-3000 Hz, but there was nostatistically significant difference in the other variables.Conclusion: Regarding postoperative hearing outcome in the labyrinthine fistula surgery, it seems that there isno universal method of reporting of hearing results. Past hearing evaluation methods in the literature have beenoften poorly comparable, based on different methodology.