Emergent, non-contrast head (cranial/brain) computed tomography
Consider:
Face and/or orbit CT
C-spine CT
Blood glucose (hypoglycemia increases risk of secondary injury and also lowers seizure threshold)
CBC
Consideration for transfusion with Hb < 7 mg/dL
Consideration of transfusing for thrombocytopenia if evidence of ICH
PT/INR/PTT
Electrolytes
Hyponatremia, hypomagnesemia, and hypophosphatemia may lower the seizure threshold
Miscellaneous labs
Beta-2 transferrin for CSF leak, needs 0.5 cc of fluid
Face and/or orbit CT
C-spine CT
Consideration for transfusion with Hb < 7 mg/dL
Consideration of transfusing for thrombocytopenia if evidence of ICH
Hyponatremia, hypomagnesemia, and hypophosphatemia may lower the seizure threshold
Beta-2 transferrin for CSF leak, needs 0.5 cc of fluid
14-15: Mild
9-13:<unk> 
3-8:<unk> 
Core temperature, Foley with bladder probe
ICP monitoring
Jugular venous oxygen saturation (SjvO2) by retrograde catherization of right IVJ associated with improved outcomes
Normal range 55-70%
Sustained desaturation < 50% requires aggressive treatment
Transcranial doppler around thinner walls of skull (insonation windows)
Temporal region above zygomatic arch, through eyes, below jaw, behind occiput
Sensitivity for brain death is ~75%, specificity 98%
Normal range 55-70%
Sustained desaturation < 50% requires aggressive treatment
Temporal region above zygomatic arch, through eyes, below jaw, behind occiput
Sensitivity for brain death is ~75%, specificity 98%
Moderate-to-severe traumatic brain injury
Traumatic brain injury
Mild traumatic brain injury
Intracranial hemorrhage
Ventriculoperitoneal shunt complications
Cerebral edema in brain cancer
Elevated intracranial pressure
Brain herniation syndromes