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Diagnostic Value of the Far Field Acoustic Response (FAR) as an Objective Evaluating Method for Brainstem Iniury Hiroshi NISHIMOTO 1 , Takashi TSUBOKAWA 1 , Takamitsu YAMAMOTO 1 , Morihiko KITAMURA 1 , Yoichi KATAYAMA 1 , Nobuo MORIYASU 1 1Department of Neurological Surgery, Nihon University School of Medicine Keyword: Head injury , Brainstem injury , Far field acoustic response , Auditory brainstem response , Computerized tomography pp.355-362
Published Date 1980/4/10
DOI https://doi.org/10.11477/mf.1436201138
  • Abstract
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Far Field Acoustic Response (FAR) was repeatedly studied from acute stage to chronic stage of severe head injury in 64 patients for evaluation of the degree of brainstem injury.

(1) In acute stage within 7 days after trauma, FAR abnormalities are found in 56% of the subjects with severe head injury. These abnormalities are as follows: (i) Prolongation of latency, disappearance of the 5th wave. (ii) Disappearance of the 1st -5th waves or 2nd -5th waves. The incidence of FAR abnormalities is not correlated to disease categories and age of the subjects.


Copyright © 1980, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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