Q. A 28-year-old man is brought to the ER because of confusion and impaired consciousness. He was riding his bike when he suddenly fell off, and he hit his head on a rock. He lost consciousness for 6 minutes then he became awake again and appeared fine, but 30 minutes later he was confused again so he was brought to the hospital. His temperature is 37.6 °C , HR is 90 beats/ minutes, BP is 165/90, and RR is 19 breaths/minutes. He is lethargic. On cognitive testing, he is oriented to place and person but not to time. The remainder of his neurological exam is unremarkable. A CT scan of his head is ordered and the results are shown below and demonstrates an epidural hematoma. According to standard of care, surgical evacuation of an epidural hematoma is indicated when which of the following criteria are met.