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pp.324-329
Published Date 1953/7/20
DOI https://doi.org/10.11477/mf.1492200924

 SAKAGUCHI finds a typical C5 clips and related curve of impaired hearing in the audiograms taken from a large majorities of miners whose work is in the pit and factory workers the makers of tincans. In comparisonj to audiograms of those affected with impaired hearing by various other causes this finding appears to establish a significant diagnostic criteria of occupational hazzard. Appearance of C5 dip seems to be a symptom manifested rather early in the course of disease; thelonger the period of exposure to the hazzard the more acute is the descent of the curve both, in the lowtone as well as the high. But all hearing loss of this nature may not be assumed by initial C5 dip; other forms are also recognized.


Copyright © 1953, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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