بررسي اختلالات شنوايي در بيماران مبتلا به اسكلروز متعدد

fearing disorders in Multiple Sclerosis patients

Introduction: Multiple sclerosis (MS) is a neurological disease that causes sudden deaf. In this research auditorydisorders were studied in the patients with multiple sclerosis (MS). Material & Method: This cross sectional descriptive-analytical study was performed on 107 patients with multiple sclerosis in the range of 20-45 yrs. There were not history of trauma and middle ear disease in all cases. Sampling was randomized. Acompleteauditory evaluation including pure tone audiometry, speech audiometry, imittance audiometry and brainstem Auditory Evoked Potential were performed on patients. Finding: In pure tone audiometry ,19.62 %ofcases had sensory neural high tone loss. In speech audio metryand imittanceaudiometry 18 and 31 cases were abnormal, respectively. 55.14% of cases had abnormality in BAEP. The most of abnornalities were prolonged latency of V,decrease ofV/l amplitude ratio and poorreproducibility, respectively. With high rate of stimulation ,77.57%ofcases were abnormal. Statistical analysis showed significant difference between latency ofVand stimulation rate. conclusion: Accordingto findings of this research it seems that hearing evaluation is very important for follow-up and early rehabilitation of auditory disorder in patients with MS. Also auditory test battery especially BA EP with high stimulation rate are useful in the diagnosis, BAEP, High stimulation rate.