What Researchers Did
Researchers analyzed hearing outcomes in 129 ears from 103 military personnel treated with HBOT (253 kPa for 80 minutes) plus corticosteroids after noise-induced hearing loss, comparing those treated within 7 days versus 21 or more days from injury.
What They Found
88% of patients treated within 7 days achieved meaningful hearing improvement (10 dB or more), compared to only 56% treated 21 or more days after injury (p=0.002). Return to combat hearing readiness was 57% in the early group versus 15% in the delayed group (p=0.017).
What This Means for Canadian Patients
For Canadians who experience sudden hearing loss from noise exposure -- whether military personnel, concert-goers, or industrial workers -- this study reinforces that treatment delay dramatically reduces the chance of recovery. Patients should seek hyperbaric assessment within 7 days of noise injury for the best outcomes.
Canadian Relevance
No direct Canadian connection identified. Relevant to Canadian Armed Forces personnel and noise-exposed workers under occupational health and safety jurisdiction.
Study Limitations
This military population is predominantly young and male, limiting application to civilian and older patient groups with noise-induced hearing loss.