Nassiri AM, Yawn RJ, Gifford RH, Haynes DS, Roberts JB, Gilbane MS, Murfee J, Bennett ML. Intraoperative Electrically Evoked Compound Action Potential (ECAP) Measurements in Traditional and Hearing Preservation Cochlear Implantation. Journal of the American Academy of Audiology. 2019 Jul 2. PMID: 31274070 [PubMed]
In current practice, the status of residual low-frequency acoustic hearing in hearing preservation cochlear implantation (CI) is unknown until activation two to three weeks postoperatively. The intraoperatively measured electrically evoked compound action potential (ECAP), a synchronous response from electrically stimulated auditory nerve fibers, is one of the first markers of auditory nerve function after cochlear implant surgery and such may provide information regarding the status of residual low-frequency acoustic hearing.