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Vestibular Function After Cochlear Implantation: A Comparison of Three Types of Electrodes
Region Östergötland, Anaesthetics, Operations and Specialty Surgery Center, Department of Otorhinolaryngology in Linköping.
Linköping University, Department of Clinical and Experimental Medicine, Division of Neuro and Inflammation Science. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Anaesthetics, Operations and Specialty Surgery Center, Department of Otorhinolaryngology in Linköping.
Linköping University, Department of Clinical and Experimental Medicine, Division of Neuro and Inflammation Science. Linköping University, Faculty of Medicine and Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Division of Neuro and Inflammation Science. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Anaesthetics, Operations and Specialty Surgery Center, Department of Otorhinolaryngology in Linköping.
2016 (English)In: Otology and Neurotology, ISSN 1531-7129, E-ISSN 1537-4505, Vol. 37, no 10, 1535-1540 p.Article in journal (Refereed) Published
Abstract [en]

Objective: To investigate the vestibular function after cochlear implantation with different types of electrode arrays. Study Design: Retrospective cohort study. Setting: Academic tertiary referral center. Materials and Methods: Forty three adults underwent first cochlear implantation. Three consecutive series of patients: Group 1 (n = 13) implanted with a precurved electrode, Group 2 (n = 15) implanted with a straight electrode, Group 3 (n = 15) implanted with a flexible electrode. Patients vestibular functions were assessed with pre-and postoperative caloric testing using videonystagmography (VNG). The postoperative reduction of the maximum slow phase velocity (MSPV) in the implanted ear was evaluated. Medical charts were reviewed to evaluate the occurrence of late onset of postoperative vestibular symptoms. Results: Mean reduction of MSPV was 7.6/s (standard deviation [SD] 8.0) in Group 1, 23.1/s (SD 16.6) in Group 2, and 0.1/s (SD 18.5) in Group 3. Significant difference was found between Group 1 and 2 (p amp;lt; 0.030) and between Group 2 and 3 (p amp;lt; 0.001). Group 2 showed a higher prevalence of late onset of clinical vertigo (28.6%) than Group 1 (7.7%) and 3 (6.7%). Conclusion: In this prospective study, significantly larger reductions of caloric responses were found in subjects implanted with a straight electrode compared with subjects implanted with a precurved or flexible electrode. These findings seem to correlate to a higher prevalence of postoperative vertigo.

Place, publisher, year, edition, pages
LIPPINCOTT WILLIAMS & WILKINS , 2016. Vol. 37, no 10, 1535-1540 p.
Keyword [en]
Caloric test; Cohlear implant; Electrode array; Postoperative vertigo; Vestibular dysfunction; Vestibular function; Videonystagmography
National Category
Otorhinolaryngology
Identifiers
URN: urn:nbn:se:liu:diva-133254DOI: 10.1097/MAO.0000000000001229ISI: 000388185000019PubMedID: 27749755OAI: oai:DiVA.org:liu-133254DiVA: diva2:1064019
Available from: 2017-01-11 Created: 2016-12-15 Last updated: 2017-01-22

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Harder, HenrikMäki-Torkko, ElinaLedin, Torbjörn
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Department of Otorhinolaryngology in LinköpingDivision of Neuro and Inflammation ScienceFaculty of Medicine and Health Sciences
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