What Researchers Did
Researchers conducted a controlled observational study to measure changes in brain injury markers in submariners undergoing a saturation dive compared to a control group.
What They Found
The study found no significant increases in brain injury markers GFAp, NfL, or tau in submariners exposed to 401 kPa in a dry hyperbaric chamber for 36 hours. While GFAp and NfL showed a significant difference in absolute change between the groups (17.7 pg·mL-1, p=0.02 and 2.34 pg·mL-1, p=0.02 respectively), these markers did not increase in the intervention group. Haematocrit and haemoglobin values slightly increased in the intervention group after hyperbaric exposure (2.3%/1.5%, p=0.02 and 4.9 g/L, p=0.06).
What This Means for Canadian Patients
This study suggests that saturation exposure to 401 kPa for 36 hours may not cause significant central nervous system damage. For Canadian professionals involved in saturation diving, these findings could help assure the safety profile of such hyperbaric exposures.
Canadian Relevance
This study covers decompression, which is a Health Canada-recognized indication for hyperbaric oxygen therapy. However, no direct Canadian connection or authors were identified.
Study Limitations
The study involved a relatively small number of participants (14 in the intervention group), which may limit the generalizability of the findings.