What Researchers Did
Researchers studied 89 professional male divers to see how a simulated hyperbaric dive to 50 meters affected their stress hormone (salivary cortisol) levels and if masks or different breathing gases during decompression had an impact.
What They Found
The study found that divers' salivary cortisol levels significantly decreased from an average of 16.0 mmol/L before the dive to 10.3 mmol/L after the dive (P < 0.01). This decrease was not affected by the increased pressure, changes in breathing gases, or wearing a mask, although there was large individual variation in cortisol responses.
What This Means for Canadian Patients
This study primarily focuses on the physiological stress response in professional divers, suggesting they are well-adapted to hyperbaric conditions. For Canadian patients, this research does not directly relate to HBOT as a medical treatment for specific conditions, but it adds to the general understanding of human physiology in hyperbaric environments.
Canadian Relevance
This study was not conducted by Canadian authors or in Canada. However, it covers aspects of decompression, which is relevant to decompression sickness, a Health Canada-recognized indication for hyperbaric oxygen therapy.
Study Limitations
A key limitation was the large individual variation in cortisol responses among divers, which the study did not fully explain or use to identify stress-sensitive individuals.