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Computer-aided surgery in the petrous bone.

A R Gunkel1, M Vogele, A Martin

  • 1ENT Clinic, University of Innsbruck, Austria.

The Laryngoscope
|November 24, 1999
PubMed
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Computer-assisted frameless stereotactic navigation using the ISG/ELEKTA Viewing Wand system is effective for petrous bone surgery. This technology provides reliable, accurate guidance, enhancing surgical outcomes in complex procedures.

Area of Science:

  • Neurosurgery
  • Medical Technology
  • Skull Base Surgery

Background:

  • Petrous bone surgery presents significant anatomical challenges.
  • Accurate intraoperative navigation is crucial for complex procedures like mastoidectomy and cholesteatoma removal.

Purpose of the Study:

  • To evaluate the feasibility and accuracy of frameless stereotactic navigation in petrous bone surgery.
  • To assess the clinical utility of the ISG/ELEKTA Viewing Wand system for intraoperative guidance.

Main Methods:

  • High-resolution computed tomography (CT) with a dedicated head holder for patient fixation.
  • Preoperative image registration in an unsterile environment using a mouthpiece attachment.
  • Intraoperative navigation utilizing either an articulated arm or a 3D optical digitizer from the ISG/ELEKTA system.

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Main Results:

  • Frameless stereotactic navigation with the ISG/ELEKTA Viewing Wand system demonstrated routine feasibility in petrous bone surgery.
  • Sufficient and consistent application accuracy was achieved throughout surgical procedures.
  • The clinical value of 3D navigation was evident in mastoidectomy, cholesteatoma surgery, and lateral skull base revision.

Conclusions:

  • Computer-assisted frameless stereotactic navigation is a reliable tool for petrous bone surgery.
  • The ISG/ELEKTA Viewing Wand system offers sufficient application accuracy, primarily limited by CT resolution.
  • This technology enhances surgical precision and clinical outcomes in complex skull base operations.