Fresh Intravenous Blood Samples for TBI Diagnostic Assay Development With Philips Point of Care System

Inclusion Criteria: * The Subject is at least 18 years of age at screening. * The Subject has presented to a Health Care Facility or Emergency Department with a suspected traumatically induced head injury, as a result of insult to the head from an external force. * The Subject has a Glasgow Coma Scale score of 13-15 at the time of Informed Consent. * The venous blood sample is collected no later than 12 hours from the time of head injury. * The Subject is competent and willing to undergo the Informed Consent process Exclusion Criteria: * Participating in any other interventional, therapeutic clinical study (an observational study would be acceptable). * Time of suspected head injury cannot be determined. * Venipuncture not feasible (i.e., skin integrity compromised at the venipuncture sites, blood vessel calcification (i.e., IV drug users, advanced atherosclerosis) both upper limbs missing (congenital or amputee)). * Blood transfusion after head injury, and prior to study blood draw * Blood donation within 1 week of study enrollment. * The subject is a female who is pregnant or lactating. * The Subject is otherwise determined by the Principal Investigator to be an unsuitable candidate for participation