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Measurement of Cochlear Implant Electrode Position From Intraoperative Post-insertion Skull Radiographs
| Content Provider | Scilit |
|---|---|
| Author | Svrakic, Maja Friedmann, David Berman, Phillip M. Davis, Adam Roland, Jr. J. Thomas Svirsky, Mario |
| Copyright Year | 2015 |
| Description | Journal: Otology & Neurotology Objective: To validate a method of measuring angular depth of insertion (aDOI) as well as positional depth of each electrode contact in a cochlear implant by using intraoperative postinsertion skull radiographs. Study Design: Retrospective review. Setting: Tertiary referral center. Patients: Intraoperative postinsertion radiographs obtained from 18 cochlear implant recipients were chosen for analysis. One high-resolution computer tomography scan of the head with the electrode in place was also analyzed. One cadaveric temporal bone with an inserted electrode provided additional data for analysis. Intervention: aDOI and position of each electrode contact were measured from the radiographs using readily available software. High-resolution computer tomography imaging of the cochlea and electrode were reconstructed in three dimensions and used to simulate head rotation during intraoperative radiographs. The cadaveric temporal bone was imaged by x-ray at various acquisition angles. Main Outcome Measures: We evaluated the error introduced in measuring aDOI by assessing intra- and inter-rater variability. We also evaluated the error introduced by x-ray acquisition at nonstandardized angles by analyzing the three-dimensional construct and the cadaveric temporal bone. Results: The concordance correlation coefficients for intrarater (0.991) and inter-rater (0.996) variability in aDOI measurement were excellent. The error introduced by nonstandardized x-ray acquisition angles was only −12.5 degrees to +15.8 degrees even at the limits of clinically relevant head rotation. Conclusions: The intraoperative postinsertion radiograph is sufficient for estimating positional depth of electrode contacts and the aDOI. This measure is robust in the face of nonstandardized x-ray acquisition angles, and shows good intra- and inter-rater variability |
| Related Links | http://europepmc.org/articles/pmc4574306?pdf=render https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4574306/pdf |
| Ending Page | 1491 |
| Page Count | 6 |
| Starting Page | 1486 |
| ISSN | 15317129 |
| e-ISSN | 15374505 |
| DOI | 10.1097/mao.0000000000000852 |
| Journal | Otology & Neurotology |
| Issue Number | 9 |
| Volume Number | 36 |
| Language | English |
| Publisher | Ovid Technologies (Wolters Kluwer Health) |
| Publisher Date | 2015-09-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Otology & Neurotology Otorhinolaryngology Cochlear Implant, Cochlear View, Depth of Insertion, Intracochlear Electrode Position, Postoperative Radiograph |
| Content Type | Text |
| Resource Type | Article |
| Subject | Otorhinolaryngology Sensory Systems Neurology (clinical) |
