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Updated: Apr 20, 2026
Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
Published on: June 21, 2024
Evaluation of new technology for intraoperative evoked compound action potential threshold measurements
George Tavartkiladze1, Vigen Bakhshinyan, Colin Irwin
1* National Research Centre for Audiology and Hearing Rehabilitation , Moscow , Russia.
Objective:
To determine whether new technology for intraoperative evoked compound action potential (ECAP) threshold measurements-the CR120 Intraoperative Remote Assistant device-is comparable to the existing Custom Sound(®) clinical system, as well as assess test-retest accuracy of the systems.
Design:
Within subject, repeated measures comparative design.
Study Sample:
ECAP data were collected from 81 pediatric subjects (41 females and 40 males).
Results:
The average ECAP threshold measurement time for the Custom Sound system was 6.2 minutes (SD = 1.0) versus 4.8 minutes (SD = 0.7) for the CR120 device. ECAP thresholds measured with Custom Sound and the CR120 device had an average Pearson product-moment correlation coefficient for all electrodes (N = 1724) of 0.92, p < 0.01; an average mean absolute difference of 6 CLs (SD = 6); and a 95% confidence interval of - 1 to 1 CLs. The test-retest results for Custom Sound and the CR120 device are also included.
Conclusion:
A significant reduction in the measurement time for ECAP thresholds was noted with the CR120 device. Furthermore, ECAP thresholds measured with the CR120 device are equivalent to Custom Sound within a clinically acceptable range.
