Cochlear implant system

A cochlear implant system, comprising

• a microphone arrangement for providing an input audio signal;
• a sound processor for generating an auditory nerve stimulation signal from the input audio signal;
• an implantable stimulation assembly comprising an electrode array to be implanted into a cochlea of a patient for electrical stimulation of the cochlea according to the neural stimulation signal;
• and
• an electrode migration monitoring unit including a unit, for capturing ECAP signals induced at the electrodes of the electrode array in response to stimulation of the cochlea by applying auditory nerve stimulation signals to the electrodes, a memory unit for storing captured ECAP signals and/or ECAP data derived from such captured ECAP signals, an electrode migration detection unit for detecting electrode migration relative to the cochlea, by comparing presently captured ECAP signals and/or ECAP data derived from such presently captured ECAP signals to stored previously captured ECAP signals and/or ECAP data derived from such previously captured ECAP signals, and a unit for outputting an alarm signal in case that electrode migration is detected by the electrode migration detection unit, wherein the electrode migration monitoring unit is adapted to repeat said capturing of ECAP signals and said comparing of ECAP signals and/or ECAP data on a regular basis.