Faculty Collaboration Database

Intraoperative Electrocochleography: A Window Into Endolymphatic Hydrops in a Patient With an Endolymphatic Sac Tumor. Otol Neurotol 2017 Apr;38(4):547-550

Date

01/21/2017

Pubmed ID

28106624

DOI

10.1097/MAO.0000000000001340

Scopus ID

2-s2.0-85009982266 (requires institutional sign-in at Scopus site)   6 Citations

Abstract

OBJECTIVES: Intraoperative electrocochleography (ECochG) provides valuable information regarding inner ear function during surgical procedures. Here, we report findings from ECochG collected at three time intervals during the management of a patient with symptoms of inner ear hydrops.

PATIENTS: A 38-year-old man with an endolymphatic sac tumor who demonstrated classic Ménière's symptoms.

INTERVENTIONS: Endolymphatic shunt, tumor biopsy, and definitive resection of an endolymphatic sac tumor.

MAIN OUTCOME MEASURES: Intraoperative ECochG measurements at three time intervals, using frequency-specific tone bursts and clicks.

RESULTS: Across time intervals, the amplitude of ECochG summation potential (SP) responses decreased for tone bursts of all frequencies. On the other hand, the SP response to the click stimulus, and the ratio of the SP to action potential (AP), basically remained unchanged across time points.

CONCLUSIONS: Results suggest that the absolute amplitude of the SP response to frequency-specific tone bursts may be more sensitive to inner ear hydrops than the traditionally used SP/AP ratio as a response to click stimuli.

Author List

Riggs WJ, Catalano DJ, Harris MS, Adunka OF, Moberly AC

Author

Michael S. Harris MD Associate Professor in the Otolaryngology department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Adult
Audiometry, Evoked Response
Ear Neoplasms
Endolymphatic Hydrops
Endolymphatic Sac
Humans
Intraoperative Neurophysiological Monitoring
Male
Meniere Disease