What Researchers Did
Researchers reported on a Japanese professional breath-hold diver who developed brain injuries after repeated deep dives.
What They Found
A Japanese breath-hold diver experienced numbness and double vision after over two hours of repetitive dives to 22 meters, with 40-80 second dives and 20-30 second surface intervals. MRI scans revealed multiple brain infarcts, including one in the brainstem. The study suggests that repeated deep breath-hold dives with short surface intervals may lead to serious or fatal accidents.
What This Means for Canadian Patients
This case report emphasizes the potential for serious brain injury, including stroke-like events, in individuals who engage in repetitive deep breath-hold diving. Canadian divers, especially those performing similar activities, should be aware of these risks and prioritize safe diving practices. While hyperbaric oxygen therapy is a treatment for diving-related injuries like decompression sickness, this study focuses on understanding the risks.
Canadian Relevance
This study covers a condition (diving injury leading to neurological damage, potentially related to decompression sickness) that falls under a Health Canada-recognized indication for hyperbaric oxygen therapy.
Study Limitations
As a case report, this study describes the experience of only one individual, meaning its findings cannot be generalized to all divers.