Labyrinthine Fistula Reviewed During Chronic Ear Surgery / 听力学及言语疾病杂志

Fifty-one cases of labyrinthine fistula had been reviewed in 1990-1997 during chronic ear surgery. All cases had a lateral semicircular canal fistula and one case had an additional posterior semicircula canal fistula. There was no relationship between the size of labyrinthine fistula and preoperative bone conduction. 34 cases had chronic otitis media with cholesteatoma,the matrix of the cholesteatoma was completely removed in all patients except one case. Preoperative bone conducton hearing was preserved after removal of cholesteatoma matrix in all cases except the one case.