title: Neural response telemetry measures in patients implanted with Nucleus 24.
abstract: 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.
authors.affiliation: Hospital das Clínicas, Medical School, University of Sao Paulo, Fundação Otorrinolaringologia. macguedes@hotmail.com
authors.forename: Mariana Cardoso
authors.initials: MC
authors.lastname: Guedes
authors.forename: Rubens V
authors.initials: RV
authors.lastname: Brito Neto
authors.forename: Maria Valéria S Goffi
authors.initials: MV
authors.lastname: Gomez
authors.forename: Sandra B Giorgi
authors.initials: SB
authors.lastname: Sant'Anna
authors.forename: Cristina G Ornelas
authors.initials: CG
authors.lastname: Peralta
authors.forename: Arthur Menino
authors.initials: AM
authors.lastname: Castilho
authors.forename: Ricardo Ferreira
authors.initials: RF
authors.lastname: Bento
mesh_terms: 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