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Smetak MR, Fernando SJ, O'Malley MR, Bennett ML, Haynes DS, Wootten CT, Virgin FW, Dwyer RT, Dawant BM, Noble JH, Labadie RF. Electrode array positioning after cochlear reimplantation from single manufacturer. Cochlear Implants Int 2023. [PMID: 37489512 PMCID: PMC10372339 DOI: 10.1080/14670100.2023.2179756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
OBJECTIVE To investigate whether revision surgery with the same device results in a change in three key indicators of electrode positioning: scalar location, mean modiolar distance (M¯), and angular insertion depth (AID). METHODS Retrospective analysis of a cochlear implant database at a university-based tertiary medical center. Intra-operative CT scans were obtained after initial and revision implantation. Electrode array (EA) position was calculated using auto-segmentation techniques. Initial and revision scalar location, M¯, and AID were compared. RESULTS Mean change in M¯ for all ears was -0.07 mm (SD 0.24 mm; P = 0.16). The mean change in AID for all ears was -5° (SD 67°; P = 0.72). Three initial implantations with pre-curved EAs resulted in a translocation from Scala Tympani (ST) to Scala Vestibuli (SV). Two remained translocated after revision, while one was corrected when revised with a straight EA. An additional five translocations occurred after revision. CONCLUSIONS In this study examining revision cochlear implantation from a single manufacturer, we demonstrated no significant change in key indicators of EA positioning, even when revising with a different style of electrode. However, the revision EA is not necessarily confined by the initial trajectory and there may be an increased risk of translocation.
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Affiliation(s)
- Miriam R. Smetak
- Department of Otolaryngology – Head and Neck Surgery, Vanderbilt University Medical Center, 1215 21st Avenue South, Nashville, TN 37232, USA
| | - Shanik J. Fernando
- Department of Otolaryngology – Head and Neck Surgery, Vanderbilt University Medical Center, 1215 21st Avenue South, Nashville, TN 37232, USA
| | - Matthew R. O'Malley
- Department of Otolaryngology – Head and Neck Surgery, Vanderbilt University Medical Center, 1215 21st Avenue South, Nashville, TN 37232, USA
| | - Marc L. Bennett
- Department of Otolaryngology – Head and Neck Surgery, Vanderbilt University Medical Center, 1215 21st Avenue South, Nashville, TN 37232, USA
| | - David S. Haynes
- Department of Otolaryngology – Head and Neck Surgery, Vanderbilt University Medical Center, 1215 21st Avenue South, Nashville, TN 37232, USA
| | - Christopher T. Wootten
- Department of Otolaryngology – Head and Neck Surgery, Vanderbilt University Medical Center, 1215 21st Avenue South, Nashville, TN 37232, USA
| | - Frank W. Virgin
- Department of Otolaryngology – Head and Neck Surgery, Vanderbilt University Medical Center, 1215 21st Avenue South, Nashville, TN 37232, USA
| | - Robert T. Dwyer
- Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, 1215 21st Avenue South, Nashville, TN 37232, USA
| | - Benoit M. Dawant
- Department of Electrical Engineering & Computer Science, Vanderbilt University, 2201 West End Avenue, Nashville, TN 37235, USA
| | - Jack H. Noble
- Department of Electrical Engineering & Computer Science, Vanderbilt University, 2201 West End Avenue, Nashville, TN 37235, USA
| | - Robert F. Labadie
- Department of Otolaryngology – Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge 135 Rutledge Avenue, MSC 550, Charleston, SC 29425, USA
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Munhall CC, Noble JH, Dawant B, Labadie RF. Cochlear Implant Translocation: Diagnosis, Prevention, and Clinical Implications. CURRENT OTORHINOLARYNGOLOGY REPORTS 2022. [DOI: 10.1007/s40136-022-00434-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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