![]() If she’s able to speak, she asks the same questions repeatedly because she can’t remember the answers. She goes robotically from place to place and from task to task as directed by her therapists. She doesn’t remember her daily activities. While in post-traumatic amnesia, the patient is somewhat responsive, but baffled by her surroundings. As the weeks of post-traumatic amnesia pass, the odds of a good recovery diminish. The duration of PTA is one of the better - but still not very reliable - predictors of long-term outcome (see page 101). Jessica’s coma lasted two to three weeks her PTA lasted more than ten weeks. In general, post-traumatic amnesia lasts three to four times longer than the preceding coma. It can be weeks or months before your survivor is able to routinely store new memories. Memory is the slowest part of the conscious mind to recover from an injury. ![]() She may be unable to recall very basic information, such as her name, your name, the season of the year, or the name of the current president. In this condition, the survivor may not understand who she is, where she is, and what is happening to her. More recently, the definition has been broadened to include a state of disorientation to time, place, and person. For years, PTA was defined as the period of time after an injury when the brain is unable to form continuous day-to-day memories. It is called post-traumatic amnesia (PTA). This is a normal part of the healing process. She may behave bizarrely or in a manner completely alien to her personality. She may be disinhibited, demonstrating a complete disregard for social conventions. She may be disoriented, agitated, angry, impulsive, or extremely emotional. Outcome prediction post-traumatic amnesia traumatic brain injury.When your survivor emerges from her coma, she likely will have little or no short-term memory. Categorizing PTA to classify severity of injury may be reducing the precision with which clinicians can plan the treatment of patients after TBI. This enables the probability of productive outcomes to be estimated with far greater precision than that possible using a classification system. This finding indicates that the greatest accuracy in prognosis is likely to be achieved using PTA as a continuous variable. The dimensional (continuous) form of PTA resulted in the greatest AUC, and lowest AIC as well as BIC, of the classification systems examined. Classification systems with a greater number of categories performed better than two-category systems. All categorization models showed longer PTA to be associated with a greater likelihood of being nonproductive at 1 year after TBI. Models were assessed using area under the receiver operating characteristic curve (AUC) as well as model-based Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC) statistics. Eight models that classify duration of PTA were evaluated-six that were based on the literature and two that were statistically driven. ![]() Participants had a primary diagnosis of TBI, emerged from PTA before discharge from inpatient hospital, and engaged in productive activities before injury. We conducted a cohort study of 1041 persons recruited from inpatient admissions to a TBI rehabilitation center between 19. This study aimed to establish the classification of PTA that would best predict functional or productivity outcomes. Despite the growing international adoption of this measure, there remains a lack of consistency in the way in which PTA duration is used to classify severity of injury. Duration of post-traumatic amnesia (PTA) has emerged as a strong measure of injury severity after traumatic brain injury (TBI).
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