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Relationship between the Degree of Endolymphatic Hydrops and Electrocochleography

Relationship between the Degree of Endolymphatic Hydrops and Electrocochleography

Authors :
Shinji Naganawa
Naomi Katayama
Michihiko Sone
Makoto Sugiura
Masaaki Teranishi
Tsutomu Nakashima
Tomoyuki Iwata
Seiichi Nakata
Masako Yamamoto
Tadao Yoshida
Hironao Otake
Source :
Audiology and Neurotology. 15:254-260
Publication Year :
2009
Publisher :
S. Karger AG, 2009.

Abstract

The purpose of this study was to evaluate the relationship between the endolymphatic space image obtained using magnetic resonance imaging (MRI) and the results of electrocochleography. Electrocochleography recordings were obtained from 25 ears of 24 patients, who underwent MRI 1 day after the intratympanic injection of gadolinium diethylenetriamine pentaacetic acid bismethylamide. The average summating potential to action potential (SP/AP) ratio in patients with significant endolymphatic hydrops in the cochlea was 54 ± 17%. However, in some patients who had significant endolymphatic hydrops in the cochlea, the SP/AP ratio was not enlarged. This may imply that elevation of the SP/AP ratio is related to not only the degree of endolymphatic hydrops but also to the persistence of hydrops.

Details

ISSN :
14219700 and 14203030
Volume :
15
Database :
OpenAIRE
Journal :
Audiology and Neurotology
Accession number :
edsair.doi.dedup.....04938d8e59b8944104ab51120d839b1e
Full Text :
https://doi.org/10.1159/000258681