What Researchers Did
Researchers reviewed the scientific literature on why HBOT can sometimes cause seizures and other toxic effects, examining the biological mechanisms and what can be done to prevent them.
What They Found
High-pressure oxygen raises reactive oxygen species (ROS) in tissues, which damages cell receptors and lowers levels of GABA — the brain's main calming neurotransmitter — increasing seizure risk. Elevated pressure itself also directly inhibits GABA receptors. Acidosis (excess acid in the blood) further lowers the seizure threshold. The authors propose that giving antioxidants, pyridoxine (vitamin B6), and low-dose sedatives before HBOT could prevent these toxic effects.
What This Means for Canadian Patients
Seizures during HBOT are rare but the most serious known side effect. This review suggests that specific pre-treatment strategies could make HBOT even safer. For Canadians starting HBOT, this is reassuring context: these risks are well-studied and manageable with proper clinical protocols.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
The proposed prevention strategies (antioxidants, pyridoxine, sedatives) are theoretical and have not yet been tested in controlled clinical trials.