S-100B as Pre-Head CT Scan Screening Test After Mild Traumatic Brain Injury

Exclusion Criteria

• •Time of injury not able to be determined
• •Head CT not done as part of clinical emergency care
• •Incarcerated
• •Non-English or Spanish speakers
• •Absence of parent/guardian for minor subjects
• •Subject and/or parent/guardian do not have capacity to consent
• •Head injury due to birth trauma, anoxia, inflammatory, toxic, infectious or metabolic encephalopathies that are not complications of head trauma
• •Ischemic or hemorrhagic stroke without associated trauma
• •(Controls are excluded if they have any of the following:History of brain tumor, melanoma and/or Alzheimer's disease; History of concussion, bone fracture or stroke (CVA or TIA) in the past month; History of surgery in the past month; Inability to obtain consent from subject and/or parent due to lack of capacity or absence of parent/guardian of minor; Inability to speak or read English; Incarceration)