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Vestibular Function After Cochlear Implantation: A Comparison of Three Types of Electrodes
Department of Otorhinolaryngology in Linköping, Anaesthetics, Operations and Specialty Surgery Center, Region Östergötland, Sweden.
Department of Otorhinolaryngology in Linköping, Anaesthetics, Operations and Specialty Surgery Center, Region Östergötland, Sweden.
Örebro University, School of Medical Sciences. Department of Otorhinolaryngology in Linköping, Anaesthetics, Operations and Specialty Surgery Center, Region Östergötland, Sweden; Division of Neuro and Inflammation Science, Department of Clinical and Experimental Medicine, Linköping University, Sweden; Linneaus Centre HEAD, Linköping University, Sweden.
Department of Otorhinolaryngology in Linköping, Anaesthetics, Operations and Specialty Surgery Center, Region Östergötland, Sweden; Division of Neuro and Inflammation Science, Department of Clinical and Experimental Medicine, Linköping University, Sweden.
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. Patient's 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 < 0.030) and between Group 2 and 3 (p < 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.
National Category
Otorhinolaryngology
Identifiers
URN: urn:nbn:se:oru:diva-63441DOI: 10.1097/MAO.0000000000001229ISI: 000388185000019PubMedID: 27749755Scopus ID: 2-s2.0-84991509120OAI: oai:DiVA.org:oru-63441DiVA: diva2:1167771
Available from: 2017-12-19 Created: 2017-12-19 Last updated: 2018-01-16Bibliographically approved

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