title: NRT test in auditory neuropathy patients with cochlear implants.
abstract: CONCLUSIONS
  In patients with auditory neuropathy (AN), waveforms of neural response telemetry (NRT) could be present, showing characteristics of low incidence, low differentiation, and large variation.
  
  
  OBJECTIVE
  To study the characteristics of NRT in AN patients who had received cochlear implants (CIs).
  
  
  METHODS
  NRT data for seven AN patients who had received Nucleus CIs were retrospectively analyzed. Twenty-one CI implantees with sensorineural hearing loss (SNHL) were included as the control group. The incidence of electrically evoked compound action potentials (ECAPs), threshold of wave N1, and amplitude of N1-P2 in the AN group were analyzed and compared between groups.
  
  
  RESULTS
  The intraoperative incidence of valid ECAPs in the AN group was 42.9%, and the postoperative incidence was 66.7%, both of which were lower than those in the SNHL group, which were 95.2% and 100%, respectively. NRT in the AN group showed larger variation and lower differentiation than in the SNHL group. Wilcoxon's non-parametric test results indicated no significant difference between AN and SNHL groups in either the threshold of ECAP or N1-P2 amplitude.
authors.affiliation: Department of Otolaryngology/Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital , Beijing , China.
authors.forename: Fei
authors.initials: F
authors.lastname: Ji
authors.forename: Jia-Nan
authors.initials: JN
authors.lastname: Li
authors.forename: Ke
authors.initials: K
authors.lastname: Liu
authors.forename: Qing-Shan
authors.initials: QS
authors.lastname: Jiao
authors.forename: Li
authors.initials: L
authors.lastname: Sun
authors.forename: Meng-Di
authors.initials: MD
authors.lastname: Hong
authors.forename: Ai-Ting
authors.initials: AT
authors.lastname: Chen
authors.forename: Si-Yang
authors.initials: SY
authors.lastname: Li
authors.forename: Shi-Ming
authors.initials: SM
authors.lastname: Yang
mesh_terms: D002648:Child; D002675:Child, Preschool; D003054:Cochlear Implants; D005072:Evoked Potentials, Auditory; D005260:Female; D006313:Hearing Loss, Central / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D008297:Male; D012189:Retrospective Studies; D013686:Telemetry
keywords: ECAP; Electrophysiology; electrically evoked compound action potential; neural response telemetry