Diagnosis and treatment of labyrinthine fistula caused by chronic otitis media

: Objective:To evaluate the clinical features diagnostic experience and the surgical management of labyrinthine fistula in chronic suppurative otitismedia.Method:Twenty-four cases(24 ears)of labyrinthine fistula caused by chronic suppurative otitis media that were treated from 2006 to 2013 were reviewed.The fistula test and temporal bone CT scan were performed before the operation, then compare the positive rates between them.In all of these cases, the lesion tissue of fistula is cleaned. Then the fistula was repair of through fascia sealing by temporal myofascial or mastoid periosteum in type Ⅰ and Ⅱ fistula.Semicircular canal occlusion was used in type Ⅲ fistula.Comparison of the effect of fistula typing on preoperative and postoperative hearing.Result:The fistulae were located at the lateral semicircular canal in 23 ears, at the lateral semicircular canal in 1 ears.Temporal bones was positive in 10 cases(41.66％) while fistula test was positive in 9 cases(37.5％). There was no statistically significant difference between the diagnosis of the labyrinthine fistula(P=0.50).The effect of fistula typing on postoperative auditory changes was not statistically significant (P=0.73).Conclusion:In the preoperative diagnosis of the fistula,the use of fistula test and CT scan simultaneously may increase the accuracy of the diagnostic. However the test results are not reliable when is negative results,intraoperative exploration is the most important method for the diagnosis of labyrinth fistula.Surgery should be based on the type of fistula,size,hearing levels and operation experience.