Lateral transorbital neuroendoscopic approach to the lateral cavernous sinus.

Overview

ObjectiveTo design and assess the quality of a novel lateral retrocanthal endoscopic approach to the lateral cavernous sinus. DesignComputer modeling software was used to optimize the geometry of the surgical pathway, which was confirmed on cadaver specimens. We calculated trajectories and surgically accessible areas to the middle fossa while applying a constraint on the amount of soft tissue retraction. SettingVirtual computer model to simulate the surgical approach and cadaver laboratory. ParticipantsThe authors. Main Outcome MeasuresAdequate surgical access to the lateral cavernous sinus and adjacent regions as determined by operations on the cadaver specimens. Additionally, geometric limitations were imposed as determined by the model so that retraction on soft tissue structures was maintained at a clinically safe distance. ResultsOur calculations revealed adequate access to the lateral cavernous sinus, Meckel cave, orbital apex, and middle fossa floor. Cadaveric testing revealed sufficient access to these areas using <10 mm of orbital retraction. ConclusionsOur study validates not only the use of computer simulation to plan operative approaches but the feasibility of the lateral retrocanthal approach to the lateral cavernous sinus.