On a personal note---my 90 year old father has such treatment for severe diabetic limb problems (prior to amputation) and we all saw significant cognitive improvements. But dementia is not the same as TBI
Hyperbaric chamber treatments did not help with mild TBI
http://www.usatoday.com/story/nation/2013/09/21/tbi-treatment-research-military-hyperbaric-oxygen-chamber/2842695/
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