title: Electric charge requirements of pediatric cochlear implant recipients enrolled in the Childhood Development After Cochlear Implantation study.
abstract: OBJECTIVE
  To evaluate mapping characteristics of children with cochlear implants who are enrolled in the Childhood Development After Cochlear Implantation (CDACI) multicenter study.
  
  
  METHODS
  Longitudinal evaluation during 24 months of speech processor maps of children with cochlear implants prospectively enrolled in the study.
  
  
  METHODS
  Six tertiary referral centers.
  
  
  METHODS
  One hundred eighty-eight children enrolled in the CDACI study who were 5 years old or younger at the time of enrollment. Of these children, 184 received unilateral implants, and 4 received simultaneous bilateral implants.
  
  
  METHODS
  Children attended regular mapping sessions at their implant clinic as part of the study protocol. Maps were examined for each subject at 4 different time intervals: at device activation and 6, 12, and 24 months postactivation.
  
  
  METHODS
  Mean C/M levels (in charge per phase) were compared for 4 different time intervals, for 3 different devices, for 6 different implant centers, and for children with normal and abnormal cochleae.
  
  
  RESULTS
  All 3 types of implant devices demonstrate significant increases in C/M levels between device activation and the 24-month appointment. Significant differences in mean C/M levels were noted between devices. Children with cochlear anomalies demonstrate significantly greater C/M levels than children with normal cochleae.
  
  
  CONCLUSIONS
  The CDACI study has enabled us to evaluate the mapping characteristics of pediatric patients who use 3 different devices and were implanted at a variety of implant centers. Analysis of such data enables us to better understand the mapping characteristics of children with cochlear implants.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, University of Michigan, Ann Arbor, Michigan, USA. zwolan@umich.edu
authors.forename: Teresa A
authors.initials: TA
authors.lastname: Zwolan
authors.forename: Mary Beth
authors.initials: MB
authors.lastname: O'Sullivan
authors.forename: Nancy E
authors.initials: NE
authors.lastname: Fink
authors.forename: John K
authors.initials: JK
authors.lastname: Niparko
mesh_terms: D002648:Child; D002675:Child, Preschool; D019929:Cochlear Implantation; D003054:Cochlear Implants / Q000706:statistics & numerical data*; D003627:Data Interpretation, Statistical; D004581:Electronics; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D007223:Infant; D008137:Longitudinal Studies; D008297:Male; D011601:Psychophysics; D012016:Reference Values; D013997:Time Factors