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:: Volume 17, Issue 2 (19 2009) ::
aud 2009, 17(2): 1-8 Back to browse issues page
Evaluation of the electrically evoked action potential threshold changes in three months after receiving the device in children with cochlear implant
Alireza Pourjavid1, Mansoureh Adel Ghahraman 2, Hessam-el-din Emamjome3, Mahin Sedaie2, Mohammad Farhadi3, Ahmad Daneshi3, Massoud Motesadi Zarandi4, Farzad Mobedshahi4, Parvaneh Abbasalipour Kabirrah4
1- M.Sc. in Audiology, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
2- Department of Audiology, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran
3- Ear, nose, thoat and Head and Neck Surgery Reseach Center, Iran University of Medical Sciences, Ira
4- Cochlear Implant Research Center, Tehran University of Medical Sciences, Iran
Abstract:   (7243 Views)

Background and Aim: In neural response telemetry (NRT), intracochlear electrodes stimulate the auditory nerve and record the neural responses. The electrical stimulation send to the auditory nerve by an electrode and the resulted response, called electrically evoked compound action potential (ECAP), is recorded by an adjacent electrode. The most important clinical applications of this test are evaluation and monitoring the intra and postoperative responses of auditory nerve and help to primary setting of speech processor. The aim of this study was evaluating of the potential&aposs threshold changes in three monthes after receiving the devise in pediatric cochlear implant recipients.
Materials and Methods: This longitudinal study evaluated the potential&aposs threshold in four given electrodes in four sessions after receiving the device by approximately one months intervals in children implanted in Amir Alam and Hazrat-e-Rasoul hospitals in 2007, July to December.
Results: ECAP mean threshold level of each electrode did not significantly change in differnent sessions, while there was significant difference between apical and basal electrodes&apos responses in every session(p<0.001).
Conclusion: The reliabiliy of the responses result in more certainty of clinician to fit the speech processor for a long time. Better responses in apical electrodes may lead to develope an effective coding strategy.

Keywords: electrically evoked compound action potential, neural response telemetry, cochlear implant
Full-Text [PDF 174 kb]   (2648 Downloads)    
Type of Study: Research |
Received: 2008/09/22 | Accepted: 2008/11/8 | Published: 2013/10/9
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Volume 17, Issue 2 (19 2009) Back to browse issues page
شنوایی شناسی - دانشگاه علوم پزشکی تهران Bimonthly Audiology - Tehran University of Medical Sciences
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