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Optic Canal Decompression: Comparison of 2 Surgical Techniques.
Paulo M Mesquita Filho1, Daniel M Prevedello2, Luciano M Prevedello2
1Department of Neurosurgery, Passo Fundo City Hospital, Rio Grande do Sul, Brazil; Department of Neurological Surgery, Ohio State University Wexner Medical Center, Columbus, Ohio, USA.
World Neurosurgery
|May 22, 2017
Summary
Endoscopic endonasal approaches (EEAs) and craniotomy offer equivalent optic canal decompression. The choice of surgical technique depends on the specific location of optic canal pathology for optimal visual outcomes.
Area of Science:
- Neurosurgery
- Ophthalmology
- Anatomy
Background:
- The optic canal transmits the optic nerve and ophthalmic artery, crucial for vision.
- Pathologies affecting the optic canal can cause nerve compression and visual impairment.
- Traditional craniotomy for decompression risks neurovascular structures; endoscopic endonasal approaches (EEAs) offer direct access.
Purpose of the Study:
- To compare the efficacy of endoscopic endonasal approaches (EEAs) versus frontotemporal craniotomy for optic canal decompression.
- To quantify the degree of optic nerve decompression achieved by each surgical technique.
Main Methods:
- Six cadaveric specimens were dissected for optic canal decompression.
- The right optic canal was approached via EEA, and the left via frontotemporal craniotomy.
- 3D CT reconstructions quantified and compared the extent of decompression.
Main Results:
- EEA achieved an average of 267.8 degrees of anterior and 258.3 degrees of posterior decompression.
- Craniotomy achieved an average of 229.3 degrees of anterior and 250.3 degrees of posterior decompression.
- Statistical analysis revealed no significant difference in decompression between the two methods.
Conclusions:
- Both EEA and craniotomy provide equivalent optic nerve decompression.
- Surgical approach selection should be guided by the precise location of optic canal pathology.
