Artikel
Spread of Excitation - a method of assessment of auditory function with cochlear implant users
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Autoren
Veröffentlicht: | 31. Mai 2005 |
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Gliederung
Text
Introduction
To evaluate the new method of objective measurement of Spread of Excitation for Nucleus 24 cochlear implant users using electrically evoked compound action potential (ECAP) of the auditory nerve (Neural Response Telemetry, NRT).
Materials and Methods
Postoperative Spread of Excitation profiles recordings were made for electrode number 5, 10, 18, applying various combinations of measurement parameters for 25 Nucleus 24 users.
Results
Clear Spread of Excitation profiles were received on every measured electrode for 20 patients, on 2 electrodes - for three patients, no response was received in two patients.
Conclusions
It is possible to determine Spread of Excitation - the longitudinal spread of electrically evoked neural excitation in the cochlea, based on NRT results. Parameters of stimulation during SoE measurements influence amplitude of responses. Significant differences in spread of excitation profile for different patients were discovered.We assumed that these differences could lead to variation in patients speech understanding.