期刊
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
卷 68, 期 2, 页码 545-555出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TBME.2020.3006934
关键词
Biomedical measurement; telemetry; deafness; ear; electrodes; impedance; impedance measurement
资金
- Jean Stieger foundation
- Fondation Charidu
- Eurostars [E! 11597 RCI]
An intuitive approach was proposed to estimate the insertion depth of cochlear implant electrodes by calculating tissue resistances from transimpedance recordings. The method showed promising results in estimating linear insertion depths of electrodes, providing potential for clinical applications.
Objective: Cochlear implant impedances are influenced by the intracochlear position of the electrodes. Herein, we present an intuitive approach to calculate tissue resistances from transimpedance recordings, ultimately enabling to estimate the insertion depth of cochlear implant electrodes. Methods: Electrode positions were measured in computed-tomography images of 20 subjects implanted with the same lateral wall cochlear implant model. The tissue resistances were estimated from intraoperative telemetry data using bivariate spline extrapolation from the transimpedance recordings. Using a phenomenological model, the electrode insertion depths were estimated. Results: The proposed method enabled the linear insertion depth of all electrodes to be estimated with an average error of 0.76 +/- 0.53 mm. Conclusion: Intraoperative telemetry recordings correlate with the linear and angular depth of electrode insertion, enabling estimations with an accuracy that can be useful for clinical applications. Significance: The proposed method can be used to objectively assess surgical outcomes during and after cochlear implantation based on non-invasive and readily available telemetry recordings.
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