[Small doses of gentamicin drum indoor injection treatment of intractableMénière disease clinical observation of the impact of the hearing].

To investigate the history,audiology,imaging,and operative characteristics of tympanosclerosis patients with intact tympanic membranes,and to provide theoretical reference for preoperative diagnosis and treatment.A retrospective study was carried out among 9 tympanosclerosis patients (16 ears) with intact tympanic membranes who underwent exploratory tympanotomy.For different patients,the different reconstruction of ossicular chain are in selection.We compared the pre-operative outcomes of pure tone audiometry and otoscope with the post-operative outcomes,and calculated their air-bone gap and improvement value.At 3 month after operation,otoscope showed that the tympanic membrane of all patiens were integrity.Tinnitus disappeared or improved in 5 cases.The mean thresholds of air conduction,bone conduction and air-bone gap were(40.33±11.48)dB,(27.34±8.46)dB,(13.16±9.85)dB respectively.The air-bone gap in 3 months after the operation was significantly smaller than that before operation(<0.05).Most of the patients with tympanosclerosis suffer mixed hearing loss.In addition to chronic inflammatory stimulation,tympanic membrane incision catheter may be one of the important pathogenic factors.Morphology and imaging are more useful in differentiation of otosclerosis.Early and active surgery interference would attain good effect.