Intra- and postoperative electrode impedance of the straight and Contour arrays of the Nucleus 24 cochlear implant: relation to T and C levels.
The objective of this study was to investigate electrode impedance in cochlear implant recipients in relation to electrically evoked stapedius reflex measurements during surgery, and to electrode design, stimulation mode, and T and C levels over a nine month period after surgery. Seventy-five implan...
| Published in: | International Journal of Audiology Vol. 45; no. 9; pp. 537 - 545 |
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| Main Authors: | , , |
| Format: | research tables/charts Journal Article |
| Published: |
Taylor & Francis Ltd
Sep2006
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106244934&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106244934 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 14992027 JW2 jtl: International Journal of Audiology issn: 14992027 maglogo: Y pubinfo: dt: Sep2006 vid: 45 iid: 9 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 106244934 2009335972 10.1080/14992020600825466 NLM17005497 106244934 ppf: 537 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Intra- and postoperative electrode impedance of the straight and Contour arrays of the Nucleus 24 cochlear implant: relation to T and C levels. aug: au: van Wermeskerken GKA van Olphen AF Smoorenburg GF affil: Department of Otorhinolaryngology, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands; gijs@vanwermeskerken.com sug: subj: Cochlear Implant Electric Stimulation Electrodes Evoked Potentials Adult Aged Analysis of Variance Child Child, Preschool Comparative Studies Correlation Coefficient Descriptive Statistics Equipment Design Middle Age Netherlands Repeated Measures Human Adult: 19-44 years Aged: 65+ years Child: 6-12 years Child, Preschool: 2-5 years Middle Aged: 45-64 years ab: The objective of this study was to investigate electrode impedance in cochlear implant recipients in relation to electrically evoked stapedius reflex measurements during surgery, and to electrode design, stimulation mode, and T and C levels over a nine month period after surgery. Seventy-five implant recipients, implanted with a Nucleus straight electrode array or a Contour array, were included. The results show that: (1) during surgery electrode impedance decreases markedly after electrically evoked stapedius reflex measurements, (2) after surgery, during the period without stimulation until speech processor switch-on, impedance increases, (3) after processor switch-on impedance decreases. The lower impedance values after a period of stimulation are found at the higher T and C levels. Impedances of the straight array electrodes are lower than those of the Contour array. The difference corresponds mainly to their respective surface areas. In addition, the straight array shows a larger increase of impedance in the apical direction than the Contour array, probably because of the larger fluid environment around the basal electrodes of the straight array. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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