Faramarzi A H, Heydari S T, Rusta M
Depatrment of Otolaryngoloy, Shiraz University of Medical Sciences, Shiraz, Iran.
Iran Red Crescent Med J. 2011 Aug;13(8):582-5. Epub 2011 Aug 1.
The incidence of fistulas found during the surgery for chronic otitis media with cholesteatoma has been reported in a wide range in different geographical areas. This study aims to find the prevalence of labyrinthine fistula in the south of Iran.
A prospective cross sectional study of 787 (504 ears belong to 462 patients) consecutive tympanoplasty with or without mastoidectomy for chronic otitis media was performed. Data on preoperative clinical and preoperative and postoperative hearing status and intraoperative findings were analyzed.
A labyrinthine fistula was found at surgery in 24 (4.7%) ears of the total 504 ears belonging to 462 patients undergoing surgery for chronic otitis media. Location of the fistula was the lateral semicircular canal in 23, posterior semicircular canal in 1 and promontory in 1 subject. There was a statistically significant difference in preoperative and postoperative AC threshold in 500-3000 Hz frequency and ABG 500-3000 Hz, but there was no statistically significant difference in the other variables.
Regarding postoperative hearing outcome in the labyrinthine fistula surgery, it seems that there is no universal method of reporting of hearing results. Past hearing evaluation methods in the literature have been often poorly comparable, based on different methodology.
据报道，在不同地理区域，慢性胆脂瘤型中耳炎手术中发现瘘管的发生率差异很大。本研究旨在确定伊朗南部迷路瘘管的患病率。
对787例（462例患者的504耳）连续进行的慢性中耳炎鼓室成形术（伴或不伴乳突切除术）进行前瞻性横断面研究。分析术前临床资料、术前和术后听力状况以及术中发现的数据。
在接受慢性中耳炎手术的462例患者的504耳中，有24耳（4.7%）在手术中发现迷路瘘管。瘘管位置：23耳位于外侧半规管，1耳位于后半规管，1耳位于岬部。500 - 3000Hz频率的术前和术后气导阈值及500 - 3000Hz的气骨导差有统计学显著差异，但其他变量无统计学显著差异。
关于迷路瘘管手术的术后听力结果，似乎没有通用的听力结果报告方法。文献中过去的听力评估方法往往基于不同的方法，可比性较差。
