Proposal for Intraoperative Administration of Intravenous Indocyanine Green to Evaluate Position of the Optic Canal, Position of the Internal Carotid Arteries, Tumor Vascularization, and Vessel Encasement in Endoscopic Endonasal Cranial Base Surgery

Proposal for Intraoperative Administration of Intravenous Indocyanine Green to Evaluate Position of the Optic Canal, Position of the Internal Carotid Arteries, Tumor Vascularization, and Vessel Encasement in Endoscopic Endonasal Cranial Base Surgery

This study is being done to demonstrate the feasibility of using a nasal endoscope to perform intraoperative angiography of surgical field, with the goals to evaluate anatomical landmarks and tumor characteristics during skull base surgery and publish a technical note.

Inclusion Criteria:

• 18 years and above
• Patients undergoing an an EEA for cranial base pathology that will require any of the following will be eligible for the study: optic canal decompression, intradural tumor dissection, dissection of tumor around the internal carotid artery.

Exclusion Criteria:

• Less than 18 years of age
• History of sulfa, iodide, or penicillin allergy
• Previous anaphylactic reaction to ICG
• Women currently pregnant or nursing