title: Evaluation of new technology for intraoperative evoked compound action potential threshold measurements.
abstract: OBJECTIVE
  To determine whether new technology for intraoperative evoked compound action potential (ECAP) threshold measurements-the CR120 Intraoperative Remote Assistant device-is comparable to the existing Custom Sound(®) clinical system, as well as assess test-retest accuracy of the systems.
  
  
  METHODS
  Within subject, repeated measures comparative design.
  
  
  METHODS
  ECAP data were collected from 81 pediatric subjects (41 females and 40 males).
  
  
  RESULTS
  The average ECAP threshold measurement time for the Custom Sound system was 6.2 minutes (SD = 1.0) versus 4.8 minutes (SD = 0.7) for the CR120 device. ECAP thresholds measured with Custom Sound and the CR120 device had an average Pearson product-moment correlation coefficient for all electrodes (N = 1724) of 0.92, p < 0.01; an average mean absolute difference of 6 CLs (SD = 6); and a 95% confidence interval of - 1 to 1 CLs. The test-retest results for Custom Sound and the CR120 device are also included.
  
  
  CONCLUSIONS
  A significant reduction in the measurement time for ECAP thresholds was noted with the CR120 device. Furthermore, ECAP thresholds measured with the CR120 device are equivalent to Custom Sound within a clinically acceptable range.
authors.affiliation: * National Research Centre for Audiology and Hearing Rehabilitation , Moscow , Russia.
authors.forename: George
authors.initials: G
authors.lastname: Tavartkiladze
authors.forename: Vigen
authors.initials: V
authors.lastname: Bakhshinyan
authors.forename: Colin
authors.initials: C
authors.lastname: Irwin
mesh_terms: D001309:Auditory Threshold; D002648:Child; D002675:Child, Preschool; D019929:Cochlear Implantation; D003054:Cochlear Implants; D004558:Electric Stimulation / Q000295:instrumentation*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D016343:Monitoring, Intraoperative / Q000295:instrumentation*; D058998:Remote Sensing Technology / Q000295:instrumentation*
keywords: Cochlear implant; compound action potential; electrically evoked; electrode; impedance; threshold