What Researchers Did
Researchers tested divers' mental and physical skills, such as manual dexterity and reaction time, when exposed to compressed air at depths equivalent to 6 ATA (50 meters) or 7 ATA (60 meters).
What They Found
At 6 ATA (50m), divers' abilities in manual dexterity, visual choice reaction time, and number ordination were not significantly changed. However, at 7 ATA (60m), performance showed slight but significant decreases. A small number of divers experienced substantial performance drops, ranging from 20% to 25% below their normal levels.
What This Means for Canadian Patients
This study highlights the importance of safe diving limits for occupational divers, including those in Canada, to prevent performance impairment underwater. Maintaining the 6 ATA (50-meter) depth limit helps ensure divers can safely perform complex tasks and reduce the risk of accidents or health issues like inert gas narcosis.
Canadian Relevance
While this was not a Canadian study, it covers aspects related to diving safety and the prevention of conditions like decompression sickness, which is a Health Canada-recognised indication for hyperbaric oxygen therapy. The 6 ATA limit mentioned is the legal limit for occupational diving in North America.
Study Limitations
This study was conducted in 1992 and involved a relatively small number of subjects, which might limit the generalizability of the findings to all divers.