Neural response telemetry measures in patients implanted with Nucleus 24.
Cochlear implantation has been recommended for children under 24 months of age. The use of objective measures is needed to help speech processor programming. The electrically evoked compound potential (EAP), which can be assessed by neural response telemetry (NRT), is one of those objective measures.


OBJECTIVE
to determine how often the EAP can be recorded by NRT system during surgery and to describe the responses.


METHODS
Clinical with transversal cohort.


METHODS
The impedances and NRT were measured in a group of 17 Nucleus 24 implant users. The responses were analyzed and compared to the etiology, hearing loss duration and electrode array position.


RESULTS
The EAP was easily recorded in the apical electrodes and, in otosclerosis and meningitis cases the EAP threshold was higher than in the other etiology cases.


CONCLUSIONS
The NRT can be found in 82% of the cases during surgery. The responses obtained may vary according to etiology and the position of electrodes along the cochlea.
Guedes
Mariana Cardoso
MC
Hospital das Clínicas, Medical School, University of Sao Paulo, Fundação Otorrinolaringologia. macguedes@hotmail.com
Brito Neto
Rubens V
RV
Gomez
Maria Valéria S Goffi
MV
Sant'Anna
Sandra B Giorgi
SB
Peralta
Cristina G Ornelas
CG
Castilho
Arthur Menino
AM
Bento
Ricardo Ferreira
RF
D000200:Action Potentials / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D001307:Auditory Perception / Q000502:physiology; D002648:Child; D002675:Child, Preschool; D019929:Cochlear Implantation; D003054:Cochlear Implants; D003638:Deafness / Q000209:etiology / Q000503:physiopathology* / Q000601:surgery; D004558:Electric Stimulation; D004566:Electrodes; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009434:Neural Pathways; D013067:Speech Perception / Q000502:physiology; D013686:Telemetry