Veterans' Cognitive Function, Mental Health, and Quality of Life After Hyperbaric Oxygen Therapy

"Each HBOT session is scheduled for approximately 95 minutes. The session will begin with a descent of up to 15 minutes (longer if needed for comfort/safety) to a pressure of 2.0 ATA, followed by 30 minutes of breathing 100% oxygen. At the midpoint, there will be a 5-minute air break from oxygen, after which subjects resume breathing 100% oxygen for another 30 minutes. Finally, the session will conclude with an ascent of up to 15 minutes (longer if needed for comfort/safety) back to 1.0 ATA.~All sessions are delivered under direct medical supervision with standardized safety protocols. Once approved after medical and behavioral screening, participants complete a battery of cognitive, mental health, and quality of life assessments at baseline (pre-) and after completing the therapy (post-). This arm is distinct from any sham or control interventions because all participants receive the active HBOT treatment."