title: [Comparing the characteristics of psychophysical tests between cochlear implant children with large vestibular aqueduct syndrome and normal inner ear].
abstract: OBJECTIVE
  The purpose of this study is to compare the characteristics of psychophysical tests between cochlear implant children with large vestibular aqueduct syndrome and normal inner ear and to analyse the characteristics of psychophysical and impedance tests for cochlear implant patients with large vestibular aqueduct syndrome.
  
  
  METHODS
  One hundred and thirty-one cochlear implant pre-lingual deafness patients participated in this study. They received cochlear implant surgery at the age of 1.5 to 12 years old from Nov, 1998 to Aug, 2003. The patients were divided into two groups. Group A had 111 patients with normal inner ear. Group B had 20 patients with radiographically proven large vestibular aqueduct syndrome. All of the patients were inserted with Nucleus 24M. The time of the first programming session was approximately 4 weeks after surgery. The psychophysical tests included T and C-Level tests. The programming techniques used in the test were suitable for the age of the patients. The R116 and R126 software were used to test the impedance of the electrodes automatically.
  
  
  RESULTS
  Using the independent-samples t-test, the impedance and T/C-Level of each electrode did not differ significantly between group A and B ( P > 0.05). The impedance and T/C-Level were not significantly different between group A and B at the time of switch-on, 1 week, 2 weeks, 3 weeks, 2 months, 3 months, 6 months, 9 months and 1 year after switch-on (P > 0.05).
  
  
  CONCLUSIONS
  The parameters of mapping were not significantly different between cochlear implant children with large vestibular aqueduct syndrome and normal inner ear. The management and procedure of mapping used in cochlear implant children with normal inner ear can be used in the children with large vestibular aqueduct syndrome.
authors.affiliation: Department of Speech and Hearing Rehabilitation, Beijing Institute of Otolaryngology, Affiliated Beijing Tongren Hospital of Capital University of Medical Sciences, Beijing, 100005, China. xueqingchen@sohu.com
authors.forename: Xueqing
authors.initials: X
authors.lastname: Chen
authors.forename: Demin
authors.initials: D
authors.lastname: Han
authors.forename: Xiaotian
authors.initials: X
authors.lastname: Zhao
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Sha
authors.initials: S
authors.lastname: Liu
authors.forename: Lingyan
authors.initials: L
authors.lastname: Mo
authors.forename: Jun
authors.initials: J
authors.lastname: Zheng
authors.forename: Yongxin
authors.initials: Y
authors.lastname: Li
authors.forename: Ying
authors.initials: Y
authors.lastname: Kong
authors.forename: Shuo
authors.initials: S
authors.lastname: Wang
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Wu
mesh_terms: D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D019929:Cochlear Implantation / Q000523:psychology*; D003638:Deafness / Q000523:psychology* / Q000601:surgery; D007758:Ear, Inner; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D010808:Physical Examination; D013577:Syndrome; D014723:Vestibular Aqueduct / Q000002:abnormalities* / Q000601:surgery