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Abstract
Scalar translocation is a severe form of intra-cochlear trauma during cochlear implant (CI) electrode insertion. This study explored the hypothesis that the dimensions of the cochlear basal turn and orientation of its inferior segment relative to surgically relevant anatomical structures influence the scalar translocation rates of a pre-curved CI electrode. In a cohort of 40 patients implanted with the Advanced Bionics Mid-Scala electrode array, the scalar translocation group (40%) had a significantly smaller mean distance A of the cochlear basal turn (p < 0.001) and wider horizontal angle between the inferior segment of the cochlear basal turn and the mastoid facial nerve (p = 0.040). A logistic regression model incorporating distance A (p = 0.003) and horizontal facial nerve angle (p = 0.017) explained 44.0–59.9% of the variance in scalar translocation and correctly classified 82.5% of cases. Every 1mm decrease in distance A was associated with a 99.2% increase in odds of translocation [95% confidence interval 80.3%, 100%], whilst every 1-degree increase in the horizontal facial nerve angle was associated with an 18.1% increase in odds of translocation [95% CI 3.0%, 35.5%]. The study findings provide an evidence-based argument for the development of a navigation system for optimal angulation of electrode insertion during CI surgery to reduce intra-cochlear trauma.
| Original language | English |
|---|---|
| Article number | 1024 |
| Pages (from-to) | 1-11 |
| Number of pages | 11 |
| Journal | Scientific Reports |
| Volume | 14 |
| Issue number | 1 |
| Early online date | 10 Jan 2024 |
| DOIs | |
| Publication status | Published - Dec 2024 |
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- 1 Finished
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Wellcome/EPSRC Centre for Medical Engineering Extension
Ourselin, S. (Primary Investigator), Barker, G. (Co-Investigator), Barnes, A. (Co-Investigator), Barrington, S. (Co-Investigator), Bergeles, C. (Co-Investigator), Bishop, M. (Co-Investigator), Blower, P. (Co-Investigator), Booth, T. (Co-Investigator), Botnar, R. (Co-Investigator), Cardoso, J. (Co-Investigator), Carmichael, D. (Co-Investigator), Chiribiri, A. (Co-Investigator), Clough, R. (Co-Investigator), Cook, G. (Co-Investigator), Counsell, S. (Co-Investigator), Dasgupta, P. (Co-Investigator), De Vecchi, A. (Co-Investigator), De Vita, E. (Co-Investigator), Edwards, D. (Co-Investigator), Goh, V. (Co-Investigator), Hajnal, J. (Co-Investigator), Hammers, A. (Co-Investigator), Hutter, J. (Co-Investigator), Ipek, O. (Co-Investigator), King, A. (Co-Investigator), Lamata de la Orden, P. (Co-Investigator), Liu, H. (Co-Investigator), Malik, S. (Co-Investigator), Marsden, P. (Co-Investigator), Modat, M. (Co-Investigator), Niederer, S. (Co-Investigator), Razavi, R. (Co-Investigator), Reader, A. (Co-Investigator), Rhode, K. (Co-Investigator), Roujol, S. (Co-Investigator), Rutherford, M. (Co-Investigator), Shapey, J. (Co-Investigator), Sparks, R. (Co-Investigator), T. M. de Rosales, R. (Co-Investigator), Terry, S. (Co-Investigator), Tournier, J.-D. (Co-Investigator), Vercauteren, T. (Co-Investigator), Williams, S. (Co-Investigator), Xia, W. (Co-Investigator), Young, A. (Co-Investigator) & academic, A. (Co-Investigator)
28/04/2022 → 27/10/2024
Project: Research