低音障害型感音難聴の臨床経過からみた病因の検討

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  • Investigation of Clinical Course and Etiology of Low-tone Sensorineural hearing Loss.

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The clinical course and therapeutic effect in 143 cases with low-tone sensorineural hearing loss (LTSH) were investigated. The treatment modaling was selected from regimens including Isosorbide or metabolic activator and vitamine B with/without steroid or vasopressor drugs based on the clinical course and findings. The results were as follows:<br>1) LTSH could be devided into two types; recurrent type and single-attack type. Sixteen cases of 52 who were classified as recurrent type were diagnosed as Meniere's disease later.<br>2) Since spontaneous recovery was often obtained in the single-attack type, the effect of the treatment was difficult to be evaluated.<br>3) In the recurrent type except typical Meniere's disease, the effect of treatment was variable, and Isosorbide, steroid and vasopressor were effective in selected cases.<br>As the pathogenesis of LTSH, several possibilities such as endolymphatic hydrops, circulatory disturbance, autoimmuno disease etc, could be considered.

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