Cognitive Function in a Traumatic Brain Injury Hyperbaric Oxygen Randomized Trial
SCHOOL OF AEROSPACE MEDICINE WRIGHT PATTERSON AFB OH AEROSPACE MEDICINE DEPT
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Objective Determine changes in cognition and posttraumatic stress disorder PTSD symptoms in subjects with traumatic brain injury TBI exposed to 2.4 atmospheres absolute atm abs breathing 100 oxygen vs. sham 1.3 atm-abs air. Methods Fifty randomized subjects completed a total of 30 exposures. A concussion history was taken, then baseline, post-series, and six-week follow-up immediate post-concussion assessment and cognitive testing, Braincheckers and PTSD Checklist for Military PCL-M tests were administered. Results No statistically significant differences between groups were noted, but both groups improved. Subgroups analyses, based on concussion history and individual test components, showed improvement in the treatment group vs. the sham. These subgroups included the number of concussive events, time from event to consent, loss of consciousness, visual memory, processing, go-no go, and simple reaction time. Conclusion There was no statistically significant difference between a sham and 2.4 atm abs hyperbaric oxygen HBO2 in cognitive scores from ImPACT and Braincheckers or composite scores in the PCL-M however both groups showed improvement. Subgroups with favorable response to treatment are identified. Future studies evaluating HBO2 should consider concussion histories or focus on validating subgroup response to determine HBO2 as a potential adjunctive treatment for persistent symptoms following TBI.
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