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An experimental approach to image guided skull base surgery employing a microscope-based neuronavigation system
T Brinker1, G Arango, J Kaminsky
1Department of Neurosurgery, Nordstadt Medical Center, Hannover, Germany.
Acta Neurochirurgica
|December 8, 1998
Summary
This study found that the microscope-based navigation system (NS) is a reliable tool for skull base surgery, offering high anatomical accuracy. Surgeons must understand its features and limitations for effective use.
Area of Science:
- Neurosurgery
- Surgical Navigation
- Anatomy
Background:
- Skull base surgery presents unique anatomical challenges.
- Microscope-based navigation systems (NS) aim to improve surgical precision.
- Evaluating the reliability and accuracy of NS in cadaveric models is crucial.
Purpose of the Study:
- To assess the usefulness and reliability of a microscope-based navigation system (MKM) in cadaveric skull base surgery.
- To determine the anatomical accuracy of the navigation system during complex dissections.
Main Methods:
- CT scans of 10 fixed cadaver heads with fiducial markers.
- Performance of transethmoidal-transsphenoidal and retrosigmoidal approaches.
- Utilized the MKM microscope-based navigation system for dissections.
Main Results:
- The navigation system demonstrated high registration accuracy (mean deviation 0.23 mm).
- Anatomical deviation during dissection was low (0.67 mm to IAC, 0.71 mm to PSCC).
- Navigation data and contouring features were beneficial, though 3D modeling had limitations.
Conclusions:
- The MKM navigation system is a reliable tool for skull base surgery with high anatomical accuracy.
- Familiarity with the navigation system's features and limitations is essential for effective surgical application.