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Amplitude Effects on Electrocochleography Outcomes
Author(s) -
Hough David,
Baker R Stanley
Publication year - 2004
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1097/00005537-200410000-00020
Subject(s) - electrocochleography , medicine , audiology , hearing loss
Objective: Electrocochleography measures in humans were examined to determine factors affecting results. Study Design: Retrospective study. Methods: Analysis was performed on data from 479 patients seen from 1998 to 2002 who underwent electrocochleography with a tympanic membrane electrode. Measures from click evoked electrocochleography (the summating potential to action potential ratio [SP/AP]) were compared with tone evoked electrocochleography (the SP amplitude). Results: Findings indicate a strong correlation between click and tone measures if the AP from click measures was over 1 μV ( P < .001), but no significant correlation between these measures if the AP was under 1 μV. Results were also analyzed with respect to patient hearing sensitivity and final diagnosis. Conclusion: Tympanic membrane electrocochleography is more efficacious when the AP from click stimulation is over 1 μV.