Relationship between the degree of endolymphatic hydrops and electrocochleography

Masako Yamamoto; Masaaki Teranishi; Shinji Naganawa; Hironao Otake; Makoto Sugiura; Tomoyuki Iwata; Tadao Yoshida; Naomi Katayama; Seiichi Nakata; Michihiko Sone; Tsutomu Nakashima

doi:10.1159/000258681

Relationship between the degree of endolymphatic hydrops and electrocochleography

Masako Yamamoto, Masaaki Teranishi, Shinji Naganawa, Hironao Otake, Makoto Sugiura, Tomoyuki Iwata, Tadao Yoshida, Naomi Katayama, Seiichi Nakata, Michihiko Sone, Tsutomu Nakashima

Research output: Contribution to journal › Article › peer-review

71 Citations (Scopus)

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.

Original language	English
Pages (from-to)	254-260
Number of pages	7
Journal	Audiology and Neurotology
Volume	15
Issue number	4
DOIs	https://doi.org/10.1159/000258681
Publication status	Published - 05-2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physiology
Otorhinolaryngology
Sensory Systems
Speech and Hearing

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10.1159/000258681

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title = "Relationship between the degree of endolymphatic hydrops and electrocochleography",

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.",

author = "Masako Yamamoto and Masaaki Teranishi and Shinji Naganawa and Hironao Otake and Makoto Sugiura and Tomoyuki Iwata and Tadao Yoshida and Naomi Katayama and Seiichi Nakata and Michihiko Sone and Tsutomu Nakashima",

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AU - Yamamoto, Masako

AU - Teranishi, Masaaki

AU - Naganawa, Shinji

AU - Otake, Hironao

AU - Sugiura, Makoto

AU - Iwata, Tomoyuki

AU - Yoshida, Tadao

AU - Katayama, Naomi

AU - Nakata, Seiichi

AU - Sone, Michihiko

AU - Nakashima, Tsutomu

PY - 2010/5

Y1 - 2010/5

N2 - 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.

AB - 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.

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Relationship between the degree of endolymphatic hydrops and electrocochleography

Abstract

All Science Journal Classification (ASJC) codes

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