What Researchers Did
Researchers studied brain function in three professional divers by recording their auditory and somatosensory responses during simulated deep-sea dives in a hyperbaric chamber.
What They Found
During simulated dives to 19 ATA (180 meters below sea level), one part of the auditory response (MLR component Pa) disappeared, while another part (MLR component Po) significantly increased in size. These auditory changes quickly returned to normal during decompression, specifically between the start of decompression and 90 meters below sea level. Additionally, the time between two points in the somatosensory response (SSEP N9-N20 interpeak latency) slightly or moderately increased in both divers, but another part (N9-N14) was not affected.
What This Means for Canadian Patients
This study explores the physiological effects of extreme hyperbaric conditions on healthy individuals, specifically professional divers. It does not directly address the therapeutic use of hyperbaric oxygen therapy (HBOT) for medical conditions. Therefore, these findings do not have direct implications for Canadian patients undergoing HBOT for recognized medical indications.
Canadian Relevance
Although this study was not conducted in Canada, it covers the topic of decompression, which is related to decompression sickness, a Health Canada-recognized indication for hyperbaric oxygen therapy.
Study Limitations
A limitation of this study is the very small sample size, as only three professional divers participated in the experiments.