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Image guided surgery for petrous apex lesions.
T Van Havenbergh1, E Koekelkoren, D De Ridder
1Department of Neurosurgery, University Hospital Antwerp, Antwerp, Belgium.
Acta Neurochirurgica
|September 25, 2003
Summary
Computer-assisted frameless stereotactic navigation in temporal bone surgery is a useful tool, providing accurate guidance with sub-2.0 mm precision. This neuronavigation system enhances petrous apex surgery without increasing operative time.
Area of Science:
- Neurosurgery
- Medical Technology
Background:
- Temporal bone surgery presents unique challenges due to complex anatomy.
- Petrous apex cholesterol granuloma requires precise surgical intervention.
Observation:
- A neuronavigation system (Stealth/Medtronic) was utilized in two patients with petrous apex cholesterol granuloma.
- Image guidance was applied during an epidural middle fossa approach.
- Intraoperative accuracy was assessed using anatomical landmarks and postoperative CT image fusion.
Findings:
- Neuronavigation in temporal bone surgery demonstrated clinical application accuracy under 2.0 mm.
- The use of image guidance did not prolong operating time or increase patient burden.
- Postoperative CT evaluation confirmed the accuracy of bone removal guided by neuronavigation.
Implications:
- Frameless stereotactic navigation is a clinically useful tool for temporal bone surgery, particularly for petrous apex procedures.
- Achieving sub-2.0 mm intraoperative accuracy is feasible with current neuronavigation systems and registration methods.
- Further cadaver studies are recommended to further validate these findings.