Related Experiment Video
Updated: Aug 21, 2026
Performing Intracochlear Electrocochleography During Cochlear Implantation
Published on: March 8, 2022
Amplitude effects on electrocochleography outcomes
1Hough Ear Institute, 3400 Northwest 56th Street, Oklahoma City, OK 73112, U.S.A. houghear@swbell.net
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 microV (P <.001), but no significant correlation between these measures if the AP was under 1 microV. 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 microV.
