![]() However, it has become apparent that there are clinically important variations within the group of injuries that result in GCS 13–15, which may help to explain the diverse outcomes experienced by this group of patients. 7 While some loss or alteration of consciousness is necessary to signal a TBI by this definition, post-traumatic amnesia (PTA) must not exceed 24 hours for the TBI to be considered mild. One common definition of mTBI, put forth by the American Congress of Rehabilitation Medicine (ACRM) in 1993, specifies a Glasgow Coma Scale (GCS) score of 13–15 in the ED and loss of consciousness (LOC) ≤ 30 minutes. 6 Thus, it is likely that the societal burden resulting from mTBI is at least equivalent to that resulting from severe TBI, given the considerably higher prevalence of the former. 2 While the likelihood of favorable recovery from mTBI within a few months is high, 3– 5 a proportion of patients experience long-standing cognitive, emotional, and/ or somatic symptoms that interfere with work, school, and/or family responsibilities. ![]() 1 The vast majority are so-called mild traumatic brain injuries (mTBI), which are at least tenfold more prevalent than more severe injuries. Based on estimates from the Centers for Disease Control and Prevention, there are more than one million emergency department (ED) visits for head injury each year in the US, with approximately 300,000 resulting hospitalizations. ![]()
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