What Researchers Did
Researchers studied respiratory muscle activity and the work of breathing using electromyography in four human subjects exposed to extreme hyperbaric conditions for 12 days.
What They Found
They found that the respiratory muscle work necessary for normal breathing was multiplied by 4 at 46 ATA. The power spectrum of thoracic EMG shifted to the left in three individuals, suggesting the existence of inspiratory muscle fatigue at high pressure.
What This Means for Canadian Patients
This research indicates that individuals, such as professional divers, operating under extreme hyperbaric conditions may experience significant respiratory muscle fatigue. Understanding these physiological changes can help inform safety protocols and monitoring for those exposed to very high pressures.
Canadian Relevance
This study has no direct Canadian connection.
Study Limitations
A significant limitation of this study is the very small sample size of only four human subjects.