This article is part of the HBOT Radar series, where we summarize the latest published hyperbaric oxygen therapy research.
Disclaimer: This article is intended for educational and informational purposes only. It summarizes published medical research conducted in clinical settings and does not evaluate Brain Spa Hyperbaric products. The hyperbaric chambers offered on this website are non-medical wellness devices and are not intended to diagnose, treat, cure, or prevent any disease. Do not make medical decisions based on this article — consult a qualified healthcare professional.
Title:
Advanced brain imaging shows structural and metabolic improvements after HBOT in a man 15 months after stroke
What this case report is about
Stroke is one of the leading causes of long-term disability, and once patients enter the chronic phase (months or years after the event), conventional medicine often assumes that recovery is minimal.
This 2025 case report challenges that assumption by documenting significant neurological and cognitive improvements in a 45-year-old man 15 months after a hemorrhagic stroke, following a structured hyperbaric oxygen therapy program.
HBOT protocol used
The patient received:
- 83 HBOT sessions
- Over 16 weeks
- At 2.0 ATA
- 90 minutes per session, with air breaks
This is a high-intensity neurorehabilitation HBOT protocol, similar to what is used in several studies on chronic stroke, TBI and long-COVID brain dysfunction.
This patient was treated in a clinical hospital setting under medical supervision. Results from clinical research cannot be directly applied to other settings or devices — always consult a healthcare professional.
Key clinical improvements
Before HBOT, the patient had:
- right-side weakness
- severe gait impairment
- wheelchair dependence
- cognitive slowing
- reduced attention and memory
After 83 sessions:
Major motor improvements
- increased muscle strength
- reduced spasticity
- better balance
- progression from wheelchair → walking with a quadruped cane
Cognitive improvements
- improved attention
- better verbal memory
- faster processing speed
These kinds of changes are unusual 15 months after a stroke, when recovery is usually thought to have plateaued.
What the imaging showed
What makes this report especially strong is that the clinical improvements were matched by two independent imaging methods:
Diffusion Tensor Imaging (DTI)
Showed increased fractional anisotropy — meaning:
white matter tracts became more organized and efficient, reflecting neuroplastic repair.
SPECT perfusion imaging
Showed significant increases in blood flow:
- +15.83% in the right motor cortex
- +15.92% in the right frontal lobe
Improved perfusion = better oxygenation, metabolism and function.
Imaging changes alongside clinical changes are more persuasive than either alone. But this remains a single uncontrolled patient who was also undergoing rehabilitation, so the imaging shows that something changed — not that hyperbaric oxygen was what changed it.
Why this matters
This case supports what multiple HBOT brain studies have shown:
- Functional recovery is possible long after the “window” of conventional rehab has closed.
- HBOT activates neuroplasticity by creating repeated cycles of high and low oxygen — the “hyperoxic-hypoxic paradox.”
- White matter tracts can reorganize even in chronic stages.
- Blood flow and metabolism in dormant brain regions can improve.
All of that is a description of what researchers are investigating, not a prediction about any individual. One case cannot tell you who will respond, or whether anyone else would.
Takeaway for the community
In this one patient, the following were reported to improve over 16 weeks:
- motor function
- mobility
- brain perfusion
- white matter integrity
- cognitive abilities
even 15 months after a hemorrhagic stroke.
How much weight this deserves. This is one patient, with no control group and no blinding. He received 83 sessions over 16 weeks while also going through rehabilitation, and the report does not let us separate the two. Case reports are how researchers flag something worth testing properly; they are not evidence that a treatment works. The value here is that the imaging gives a concrete hypothesis for a controlled trial to check.
HBOT Radar will continue to track all imaging-based studies that show how HBOT supports neuroplasticity in chronic neurological conditions.
Study link: https://pubmed.ncbi.nlm.nih.gov/41068989/
Educational disclaimer
This content summarizes findings from published medical research for educational purposes only.
The hyperbaric chambers sold on this website are non-medical wellness devices and are not intended to diagnose, treat, cure, or prevent any disease.
The studies discussed here were conducted in clinical medical settings using medical-grade interventions. The inclusion of research summaries does not imply that similar outcomes can be achieved using non-medical wellness devices.
