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Korean Journal of Otorhinolaryngology-Head and Neck Surgery 1989;32(1): 19-25. |
Prognostic Evaluation of Sudden Deafness Using Correcting Rate |
Chin Saeng Cho, MD, Chang Il Cha, MD, Eun Yeol Chang, MD, and Howe Young Ahn, MD |
Department of Otolaryngology, College of Medicine, Kyung Hee University, Korea |
청력개선율을 이용한 돌발성 난청의 예후 판정에 관한 고찰 |
조진생 · 차창일 · 장은열 · 안회영 |
경희대학교 의과대학 이비인후과학교실 |
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ABSTRACT |
Sudden deafness may be defined as a loss of at least 30 dB in three contiguous frequencies without definitive cause. We studied 32 cases of sudden deafness which were treated with low molecular weight dextran, steroid and vitamines. We calculated correcting rate which showed the percentage of hearing improvement based on initial hearing loss in cases with hearing loss of none affected side within 29dB. We used correcting rate as an indicator of prognosis. Right side was 14 cases, left side 15 cases and both side 3 cases. In audiogram, ascending type had favorable prognosis. In cases with dizziness and deaf patient on initial audiogram, prognosis was poor. There was difference of average in stapedial reflex threshold between two groups ; one having correcting rate above 50% and the other having it below 50%. This didn't have statistic significance.
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