脳幹性難聴の診断について

概要

論文の詳細を見る
This paper deals with the audiometric findings including ABR (auditory brainstem responses) test results from three patients suspected to have brainstem deafness and with the diagnosis of brainstem deafness.The following results were obtained.1) The chief complaint of patients with brainstem deafness was difficulty in recognizing words in conversation.2) In pure tone audiometry, light-grade hearing loss in threshold, symmetric audiogram and fluctuating hearing impairment were found.3) The temporal threshold drift (T. T. D.) tended to be negative.4) In speech audiometry, maximum articulation scores (M. A. S.) of three patient were bilaterally low and were about 50%.5) Their ABR were the same as those obtained from patients with brainstem disorders.The ABR, that probably originates in the auditory pathway in the brainstem by auditory stimuli, seems to be applicable as a diagnostic tool of brainstem deafness. However, the ABR test alone is not sufficient in diagnosing brainstem deafness. A battery of otoneurological examinations should be performed for the determination of lesions in auditory disturbances.
耳鼻咽喉科臨床学会の論文