Outcome

The study demonstrated that 20 sessions of low-pressure hyperbaric oxygenation (HBO) at 1.3 ATA significantly improved regional cerebral blood flow (rCBF) in the right hippocampal and parahippocampal regions of firefighters with mild traumatic brain injury (mTBI) and emotional distress. Measured using arterial spin labeling perfusion magnetic resonance imaging the increased rCBF indicates that HBO therapy can enhance neural activities in critical brain areas associated with emotional regulation and memory.

Introduction

Mild traumatic brain injury (mTBI) and emotional distress are prevalent concerns among firefighters often leading to lasting impacts on brain function and quality of life. This study investigates the potential benefits of low-pressure hyperbaric oxygenation (HBO) therapy at 1.3 atmospheres absolute (ATA) on regional cerebral blood flow (rCBF) within the limbic system particularly targeting the hippocampal and parahippocampal regions which are crucial for emotions and memory. Conducted over 20 sessions each lasting 45 minutes the therapy aimed to assess changes in rCBF using arterial spin labeling perfusion magnetic resonance imaging. The results indicate a significant increase in rCBF in the right hippocampal and parahippocampal areas suggesting that HBO therapy could enhance neural activities and alleviate symptoms of psychiatric disorders in individuals with mTBI and emotional distress. These findings highlight the potential of HBO as a therapeutic intervention to improve brain function in affected individuals particularly those in high-risk professions such as firefighting.

Results

The study revealed that 20 sessions of low-pressure hyperbaric oxygenation (HBO) at 1.3 ATA for 45 minutes each significantly improved regional cerebral blood flow (rCBF) in the right hippocampal and parahippocampal regions of firefighters experiencing mild traumatic brain injury (mTBI) and emotional distress. The rCBF measured using arterial spin labeling perfusion magnetic resonance imaging (MRI) increased notably in these areas which had displayed reduced blood flow relative to a healthy control group.

Before the HBO therapy the affected regions—critical for emotional regulation and memory—showed lower baseline blood flow. Post-therapy measurements indicated a significant increase in a cluster within these brain regions (peak t = 4.31; cluster size = 248 mm³) suggesting that HBO enhanced neural activities and consequently cerebral perfusion in these areas.

These findings underscore HBO’s potential as a therapeutic tool for improving brain function and mitigating symptoms of psychiatric disorders in individuals with mTBI and emotional distress. The observed increase in rCBF in the hippocampal and parahippocampal regions suggests a mechanism through which HBO therapy could exert its beneficial effects enhancing neural activity by restoring blood flow to critical brain regions. This presents compelling evidence supporting the use of low-pressure HBO in clinical applications for neurological and psychiatric conditions offering significant implications for treatment protocols especially among high-risk populations such as firefighters.

The study contributes to a growing body of evidence demonstrating the broader therapeutic benefits of HBO extending beyond its well-documented efficacy in treating tissue injuries to potentially addressing complex neurological conditions.

Conclusion

The findings of this study demonstrate that low-pressure hyperbaric oxygenation (HBO) therapy at 1.3 ATA significantly enhances regional cerebral blood flow (rCBF) in the right hippocampal and parahippocampal regions of firefighters suffering from mild traumatic brain injury (mTBI) and emotional distress. This observed increase in rCBF measured using arterial spin labeling perfusion MRI suggests that HBO therapy may bolster neural activity and ameliorate symptoms of psychiatric disorders in affected individuals. These results underscore the potential of HBO as a viable therapeutic tool for improving brain function in cases of mTBI and associated emotional distress. Future research should explore the long-term effects of HBO treatment optimal session durations and frequencies and its applicability to other conditions involving compromised cerebral blood flow and neurological impairments. These investigations will help solidify the role of HBO in clinical settings and expand its therapeutic utility.