Abstract
The supraorbital eyebrow approach (SEa) has been commonly used as a straightforward route to reach lesions located in the anterior cranial fossa. The reduced surgical exposure provided by this approach limits its applicability. A modification of the SEa, the extended supraorbital eyebrow approach (X-SEa), allows use of the transylvian corridor to approach parasellar lesions, while maintaining most of the aesthetic advantages of the SEa. To quantify the surgical exposure and maneuverability provided by the X-SEa using a cadaveric study. Eleven heads were used to obtain all stereotactic measurements. Surgical exposure and maneuverability were measured by means of the area of exposure and the angles of attack along key representative points in the anterior circulation. The horizontal angle of attack at the middle cerebral artery provided by the X-SEa was larger than that provided by the SEa (32.6 vs 18.4°, p = 0.009). The X-SEa afforded broader vertical angles of attack at all targets in the anterior circulation (p < 0.05). The total area of exposure provided by the X-SEa was significantly larger than that provided by the SEa (1272 vs 978 ± 156 mm2, p = 0.003). The area of exposure in the ipsilateral trigon and in the midline quadrangle was also significantly larger for the X-SEa (paramedian 195 vs 121 mm2, p = 0.01; midline 1310 vs 778 mm2, p = 0.002). The X-SEa increases the exposure and surgical maneuverability along the anterior and middle cranial fossa when compared to the standard SEa.
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Abbreviations
- AComA:
-
anterior communicating artery
- AoA:
-
angle of attack
- H-AoA:
-
horizontal angle of attack
- MCA:
-
middle cerebral artery
- MIA:
-
minimally invasive approach
- PCA:
-
posterior cerebral artery
- SEa:
-
supraorbital eyebrow approach
- V-AoA:
-
vertical angle of attack
- X-SEa:
-
extreme supraorbital eyebrow approach
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Anatomical dissections and measurements were performed at the ALT-VISION dissection lab at The Ohio State University.
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Daniel M. Prevedello is a consultant for Integra LifeSciences Corp, Stryker Corporation, and Medtronic Corp. He has equity on 3 rivers LLC, eLUM Technologies, LLC and Soliton LLC. He receives royalties from KLS-Martin and Mizuho.
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Informed consent and ethical approval were not deemed necessary by the local ethics in view of the design of the study (retrospective) and the application of strict patient privacy regulations operating in our center (cadavers were unidentified).
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This manuscript has not been previously published in whole or in part or submitted elsewhere for review.
This study is important as it provides a new variation of a minimally invasive approach that expands previous indications for supraoprbital eyebrow approach, while it maintains most of its advantages. An increase on the area of exposure, by adding a minimal bone removal, exponentially improves the surgical view in the deepening of the sylvan fissure and the surgical manipulability.
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Martinez-Perez, R., Albonette-Felicio, T., Hardesty, D.A. et al. Same viewing angle, minimal craniotomy enlargement, extreme exposure increase: the extended supraorbital eyebrow approach. Neurosurg Rev 44, 1141–1150 (2021). https://doi.org/10.1007/s10143-020-01306-2
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DOI: https://doi.org/10.1007/s10143-020-01306-2