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The navigation-controlled drill in temporal bone surgery: a feasibility study.

Gero Strauss1, Kirill Koulechov, Mathias Hofer

  • 1Department of ENT, University Hospital Leipzig, Leipzig, Germany. Gero.Strauss@medizin.uni-leipzig.de

The Laryngoscope
|March 6, 2007
PubMed
Summary
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Navigation-controlled (NC) drills show feasibility for petrosal bone surgery. This technology enhances drilling precision and reduces complications, offering a promising advancement for neurotologic procedures.

Area of Science:

  • Neurosurgery
  • Medical Devices
  • Surgical Navigation

Background:

  • Petrosal bone surgery presents significant challenges due to proximity of critical structures.
  • Current surgical techniques carry risks of injury to facial nerve, semicircular canal, and sigmoid sinus.
  • Navigation-controlled (NC) drilling offers potential for enhanced safety and precision.

Purpose of the Study:

  • To evaluate the feasibility of a navigation-controlled (NC) drill for petrosal bone surgery.
  • To assess the safety and efficacy of NC drilling in a mastoidectomy model.
  • To compare NC-assisted drilling with conventional methods in terms of accuracy and complication rates.

Main Methods:

  • An optical navigation system (MiMed) and Unidrive surgical engine were used.

Related Experiment Videos

  • Workspace for mastoidectomy was manually defined on CT scans of a petrosal bone phantom.
  • Ten surgeons (5 experienced, 5 inexperienced) performed mastoidectomies with and without NC guidance.
  • Procedure time, injuries to risk structures, and cavity dimensions were logged and measured.

    • Main Results:

    • NC-guided drilling demonstrated improved performance with reduced deviation from the planned volume.
    • Groups utilizing NC guidance reported no injuries to facial nerve, horizontal semicircular canal, or sigmoid sinus.
    • Conventional drilling by experienced surgeons resulted in one facial nerve injury.

    Conclusions:

    • The study confirms the fundamental feasibility of NC drills for petrosal bone surgery, specifically mastoidectomy.
    • NC drilling leads to faster, more precise tissue resection with fewer complications.
    • This technology provides a promising foundation for implementing NC systems in neurotologic surgery.