Effect of nitrous oxide use on long-term neurologic and neuropsychological outcome in patients who received temporary proximal artery occlusion during cerebral aneurysm clipping surgery. Categories: Nitrous Oxide Author: Clarke W, Hindman B, IHAST Investigators, Lanier WL, McGregor DG, Pasternak JJ, Rusy DA, Schroeder DR, Todd MM, Torner J