急性中耳炎に随伴する内耳障害の検討
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概要
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Objective: I studied how acute otitis media (AOM) damaged the inner ear. Subjects: Subjects numbered 94 with AOM 102 ears 16 to 81 years old (average: 44.7 years) seen at Suzuki ENT clinic from August 2007 to July 2009. Method: All underwent pure-tone audiometry. Inner ear damage was diagnosed under 3 conditions: (1) continuous tinnitus or dizziness, (2) bone-conduction threshold exceeding 25 dBHL and above the threshold of the unaffected side by 15 dB or more at least 1 frequency, and (3) post treatment bone-conduction threshold improving over 15 dB in bilateral cases. Those with inner ear damage were treated by oral mecobalamin and adenosine triphosphate, and many had betamethasone added. Results: (1) Inner ear damage was noted in 34.3%. (2) One subject reported dizziness without nystagmus. (3) The group with inner ear damage showed significantly higher damage than that without in terms of cochlear symptoms such as hearing loss, tinnitus, and ear fullness and with large blisters on the tympanic membrane. (4) Large blisters on the tympanic membrane were detected in the 8 months from February to September. (5) After treatment, tinnitus disappeared in all cases with continuous tinnitus and without bone-conduction threshold deterioration. In those with bone-conduction threshold deterioration, 91.3% showed complete recovery and 8.7% partial recovery. Conclusions: Bullous myringitis is associated with AOM-induced inner ear damage. Inner ear damage is not rare, so we must check for that related to AOM. Audiometric testing is recommended in cases of AOM with cochlear symptoms or tympanic membrane blisters.
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