“…The selection criteria for the use of a shunt include: abnormal intraoperative EEG, decreased cerebral blood flow, preoperative and/or intraoperative neurologic deficit, poor back bleeding, low internal carotid artery back pressure (stump pressure), and contralateral carotid occlusion (4). While most of these criteria were identified and included on the CE coding sheet, they were infrequently reported.…”