Age-dependent variation in eCAP measures across cochlear electrode locations: effects of interphase gap in cochlear implant users

Electrophysiological measures obtained from cochlear implants provide objective information about the electrode-neuron interface (ENI). Although conventional electrically evoked compound action potential (eCAP) measures are widely used to characterize neural responsiveness, their sensitivity to age- and electrode-dependent differences remains unclear....

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No immediate practice change is warranted; findings are preliminary and require replication, but audiologists fitting cochlear implants should be aware that eCAP measures may vary by patient age and electrode location, which could eventually inform individualized fitting strategies.

Understanding how age interacts with eCAP parameters across the electrode array could improve objective, data-driven cochlear implant programming across the lifespan.

1. 01eCAP measures varied by cochlear electrode location in cochlear implant users.
2. 02Age was a significant factor influencing eCAP responses, independent of electrode position.
3. 03Interphase gap manipulation had differential effects depending on the patient's age.
4. 04Findings suggest that one-size-fits-all eCAP-based fitting protocols may not be optimal across age groups.
5. 05Published in Hearing Research, a peer-reviewed audiology journal.

PMID

42913316

DOI

10.1016/j.heares.2026.109834.

Journal

Hearing Research

Publication type

research_article

Evidence level

2b

Population

Cochlear implant users across a range of ages

Intervention

Interphase gap parameter manipulation during eCAP measurement across multiple cochlear electrode locations