Clinical Results of AutoNRT,™ a Completely Automatic ECAP Recording System for Cochlear Implants

• DOI: 10.1097/aud.0b013e31806dc1d1
• Publication Date: 2007-06-25T10:19:29Z
• Authors: Bas van Dijk; Andrew M. Botros; Rolf-Dieter Battmer; Klaus Begall; Norbert Dillier; Matthias Hey; Wai Kong Lai; Thomas Lenarz; Roland Laszig; Andre Morsnowski; Joachim Müller-Deile; Colleen Psarros; Jon Shallop; Benno Weber; Thomas Wesarg; Andrzej Zarowski; Erwin Offeciers
• Keywords: Cochlear Implantation

In Brief Objective: AutoNRT™ is the completely automatic electrically evoked compound action potential (ECAP) measuring algorithm in recently released Nucleus Freedom cochlear implant system. AutoNRT allows clinicians to automatically record T-NRT profiles that turn can be used as a guide for initial fitting. The consists of pattern recognition part judges if traces contain an ECAP and intelligent flow optimizes measurement parameters finds threshold (T-NRT). objective this study was determine how accurate, reliable, fast measurements are. Design: Data on more than 400 electrodes were collected multicenter clinical trial values determined by compared with determinations same data different human observers. Also, time took analyzed. Results: 90% cases, absolute difference between observer less 9 CL; median 3 CL. A second experiment, which group observers asked analyze NRT data, showed high variability T-NRT; some two experienced disagreed 30 current levels. Compared group, performed well "average" clinician, advantage are objective. Analysis timing average intraoperative 20 sec per electrode standard deviation 5 sec, suggesting total array 22 measured intraoperatively about 7 minutes average. Conclusions: provides comparable accuracy clinician but added benefit significant savings over manual recordings. This makes it valuable tool recipients. ECAP, reports results electrodes. Automatically thresholds those found implications discussed. conclusion: reliable offers similar T-NRTs.