Lin chuang er bi yan hou ke za zhi = Journal of clinical otorhinolaryngology · 2000
[Neurootologic study of acoustic neuroma].
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Wang W Q, Wu L W
Аннотация
OBJECTIVE: To summarize the outcome of neurootologic examination of acoustic neuroma and study of diagnostic significance of neurootologic examination on acoustic neuroma.
METHOD: 13 patients were examined with pure tune test, acoustic immittance, electronystagmography, acoustic brainstem evoked response, electrocochleogram, otoacoustic emissions and facial electroneurography.
RESULT: All patients had subjective hearing loss. One patient had normal pure tone audiogram, other 4 patients had normal pure tone test at the frequency < 2000 Hz. The outcome of acoustic immittance is various. 5 patients were normal in caloric test, but all were abnormal in visual-vestibular optokinetic response. ABR are positive in 90.9% of cases, but 2 patients had no response. 7 patients were abnormal in facial electroneurography, 3 (of 3) eletrocochleogram and 2 (of 2) otoacoustic emissions revealed retrocochlear pathology.
CONCLUSION: Neurootologic examination played important role in filtering diagnosis of acoustic neuroma, results should be considered synthetically, acoustic neuroma should not be ruled out if any one test was negative.
METHOD: 13 patients were examined with pure tune test, acoustic immittance, electronystagmography, acoustic brainstem evoked response, electrocochleogram, otoacoustic emissions and facial electroneurography.
RESULT: All patients had subjective hearing loss. One patient had normal pure tone audiogram, other 4 patients had normal pure tone test at the frequency < 2000 Hz. The outcome of acoustic immittance is various. 5 patients were normal in caloric test, but all were abnormal in visual-vestibular optokinetic response. ABR are positive in 90.9% of cases, but 2 patients had no response. 7 patients were abnormal in facial electroneurography, 3 (of 3) eletrocochleogram and 2 (of 2) otoacoustic emissions revealed retrocochlear pathology.
CONCLUSION: Neurootologic examination played important role in filtering diagnosis of acoustic neuroma, results should be considered synthetically, acoustic neuroma should not be ruled out if any one test was negative.