A Sleeve-Based, Micromotion Avoiding, Retractable and Tear-Opening (SMART) Insertion Tool for Cochlear Implantation

Aebischer, Philipp; Weder, Stefan; Mantokoudis, Georgios; Vischer, Mattheus; Caversaccio, Marco; Wimmer, Wilhelm (2022). A Sleeve-Based, Micromotion Avoiding, Retractable and Tear-Opening (SMART) Insertion Tool for Cochlear Implantation (In Press). IEEE transactions on biomedical engineering, PP Institute of Electrical and Electronics Engineers IEEE 10.1109/TBME.2022.3204069

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Objective: In classical cochlear implantation, the insertion of the electrode array is strongly affected by the local anatomy and human kinematics. Herein, we present a concept for an insertion tool that allows to optimize the insertion trajectory beyond anatomical constraints and stabilizes the electrode array in manual implantation. A novel sleeve-based design allows the instrument to be compliant and potentially protective to intracochlear structures, while a tear-open mechanism allows it to be removed after insertion by simply retracting the tool. Methods: Conventional and tool-guided manual insertions were performed by expert cochlear implant surgeons in an analog temporal bone model that allows to simultaneously record intracochlear pressure, insertion forces and electrode array deformation. Results: Comparison between conventional and tool-guided insertions demonstrate a substantial reduction of maximum insertion forces, force variations, transverse intracochlear electrode array movement, and pressure transients. Conclusion: The presented tool can be utilized in manual cochlear implantation and significantly improves key metrics associated with intracochlear trauma. Significance: The instrument may ultimately help improve hearing outcomes in cochlear implantation. The versatile design may be used in both manual cochlear implantation and motorized and robotic insertion, as well as image-guided surgery.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT)
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Hearing Research Laboratory

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Aebischer, Philipp; Weder, Stefan Andreas; Mantokoudis, Georgios; Vischer, Mattheus; Caversaccio, Marco and Wimmer, Wilhelm

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0018-9294

Publisher:

Institute of Electrical and Electronics Engineers IEEE

Language:

English

Submitter:

Wilhelm Wimmer

Date Deposited:

08 Sep 2022 07:51

Last Modified:

05 Dec 2022 16:23

Publisher DOI:

10.1109/TBME.2022.3204069

PubMed ID:

36063524

BORIS DOI:

10.48350/172704

URI:

https://boris.unibe.ch/id/eprint/172704

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