What Researchers Did
Researchers used EEG microstate analysis, which maps rapid shifts in whole-brain electrical patterns, to study how 20 minutes of HBOT affected brain activity in 32 traumatic brain injury patients with disorders of consciousness.
What They Found
In minimally conscious state (MCS) patients, microstate D activity linked to higher-level brain processing increased significantly in duration, occurrence, and coverage during HBOT. Patients who improved by more than 3 points on the Coma Recovery Scale also showed significant microstate D increases. Real-time EEG monitoring during HBOT was confirmed safe and technically feasible.
What This Means for Canadian Patients
For Canadian families of patients with prolonged disorders of consciousness after traumatic brain injury, HBOT may activate measurable brain activity, and EEG monitoring during sessions could help predict who is likely to recover consciousness. This could inform difficult decisions about continuing or adjusting care.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
With 32 patients and no sham-controlled comparison, it is unclear whether EEG changes during HBOT reflect genuine recovery-linked improvement or a temporary physiological response to increased oxygen that does not persist after the session ends.