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Minimally invasive, multi-port approach to the lateral skull base: a first in vitro evaluation

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International Journal of Computer Assisted Radiology and Surgery Aims and scope Submit manuscript

Abstract

Purpose

The aim of the study was to validate a minimally invasive, multi-port approach to the internal auditory canal at the lateral skull base on a cadaver specimen.

Methods

Fiducials and a custom baseplate were fixed on a cadaver skull, and a computed tomography image was acquired. Three trajectories from the mastoid surface to the internal auditory canal were computed with a custom planning tool. A self-developed positioning system with a drill guide was attached to the baseplate. After referencing on a high precision coordinate measuring machine, the drill guide was aligned according to the planned trajectories. Drilling of three trajectories was performed with a medical stainless steel drill bit.

Results

The process of planning and drilling three trajectories to the internal auditory canal with the presented workflow and tools was successful. The mean drilling error of the system (Euclidian distance between the planned trajectory and centerline of the actual drilled canal) was \(0.53 \pm 0.12\) mm at the entry point and \(1.01\pm 0.39\) mm at the target. The inaccuracy of the drill process itself and its physical limitations were identified as the main contributing factors.

Conclusion

The presented system allows the planning and drilling of multiple minimally invasive canals at the lateral skull base. Further studies are required to reduce the drilling error and evaluate the clinical application of the system.

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Acknowledgements

This study was funded by the German Research Foundation FOR-1585.

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Authors and Affiliations

  1. Department of Otorhinolaryngology, University Hospital Düsseldorf, 40225, Düsseldorf, Germany

    Igor Stenin, J. Kristin, T. Klenzner & J. Schipper

  2. Department of Otorhinolaryngology, University Hospital Essen, Essen, Germany

    Stefan Hansen

  3. Laboratory for Machine Tools and Production Engineering, RWTH Aachen University, Aachen, Germany

    M. Nau-Hermes & J. Bredemann

  4. Interactive Graphics Systems Group, Technical University Darmstadt, Darmstadt, Germany

    W. El-Hakimi & M. Becker

Authors
  1. Igor Stenin
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  2. Stefan Hansen
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  3. M. Nau-Hermes
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  4. W. El-Hakimi
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  5. M. Becker
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  6. J. Bredemann
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  7. J. Kristin
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  8. T. Klenzner
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  9. J. Schipper
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Corresponding author

Correspondence to Igor Stenin.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Stenin, I., Hansen, S., Nau-Hermes, M. et al. Minimally invasive, multi-port approach to the lateral skull base: a first in vitro evaluation. Int J CARS 12, 889–895 (2017). https://doi.org/10.1007/s11548-017-1533-5

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  • DOI: https://doi.org/10.1007/s11548-017-1533-5

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