What Researchers Did
Researchers investigated the effect of pre-breathing oxygen at different depths on the oxidative status and intracellular calcium levels in lymphocytes of six scuba divers.
What They Found
The dives slightly decreased lymphocyte number and significantly reduced lymphocyte hydrogen peroxide levels. Catalase activity was higher after scuba diving, and pre-breathing oxygen at 6 msw enhanced mRNA expression of antioxidant enzymes (CAT, GPx, and SOD). Intracellular calcium levels were higher after normal breathing and sea-level oxygen pre-breathing, but maintained at pre-diving values after pre-breathing oxygen at 6 msw and 12 msw.
What This Means for Canadian Patients
For Canadian divers, pre-breathing oxygen, particularly at deeper levels like 12 msw, may enhance the body's natural antioxidant activity. This could potentially reduce reactive oxygen species and mitigate oxidative stress associated with scuba diving.
Canadian Relevance
This study has no direct Canadian connection as it was not conducted in Canada nor involved Canadian participants or institutions.
Study Limitations
A limitation of this study is its small sample size of only six divers, which may limit the generalizability of the findings.