Sudden Sensorineural Hearing Loss Caused by Noise Exposure to Intense Sound
강력한 소음의 노출로 인해 발생한 것으로 추정되는 돌발성 난청 2례
김, 규상; 김, 진숙; 박, 기현
Taehan Sanŏp Ŭihakhoe chi, 10(4):618-626, 1998
Taehan Sanŏp Ŭihakhoe chi; 대한산업의학회지
Sudden deafness may be defined as a sensorineural hearing loss that develope over a period of hours or a few days. The severity of the hearing loss may vary from mild to total loss of perception of the most intense sound. The loss of hearing may be
permanent, or the hearing may spontaneously return to normal or near normal. Proposed
explanations for sudden idiopathic sensorineural loss revolve primarily around viral or vascular etiologies.
In addition to noise-induced deafness, which can be divided into a slowly progressive
deafness caused by prolonged intense noise exposure and acute acoustic trauma caused
by a single exposure to very intense sound.
45- and 52-year-old healthy male smokers with no previous otologic history, noted the
acute loss of hearing with tinnitus in his right ear during his unusual intense noise
exposed activities. There were no other associated symptoms of dizziness or visual
change. After several days without improvement, they presented to the department of otolaryngology. Physical examination, neurologic evaluation, and otorhinolaryngologic examination were essentially within normal limits except for the hearing loss on the right ear. An audiogram revealed a severe primarily sensorineural sensitivity loss on the
right. Routine laboratory studies were within normal limits. Two patients denied
previous barotrauma, atypical or unusual drug usage, and unusual physical exertion or
strain. We observed evidence of cochlear abnormality. The presence of cochlear
dysfunction is supported by acoustic reflex threshold and auditory brain-stem response.
These findings strengthened the probability of an acoustic trauma origin for the sudden
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