Otoadmittance MeterによるBell麻痺およびRamsay-Hunt症候群のあぶみ骨筋反射について

概要

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The function of the stapedius muscle in patients with Bell's palsy and Ramsay-Hunt syndrome was analysed by the test of changes in otoadmittance of the ear caused by reflex contraction of the stapedius muscle. Twenty-one (53%) among 40 patients with Bell's palsy showed a positive stapedius muscle function 3 weeks after the onset. This percentage was almost the same in the test of stapedius muscle function in the 7th, 14th and 21st days after the palsy onset. On the other hand, the positive stapedius function was increased in 4 weeks after the onset. Bell's palsy patients with a positive stapedius muscle function showed a slight degree of the facial paralysis compared to the higher degree of the paralysis in patients with a negative stapedius function within 3 weeks of the onset. A positive stapedius muscle function was also observed in some cases of Ramsay-Hunt syndrome. We conclude that the stapedius muscle function in Bell's palsy patients should be tested within 3 weeks after the onset for the etiological diagnosis, in order to determine prognosis and the treatment.
耳鼻咽喉科臨床学会の論文