What Researchers Did
Researchers investigated free radical metabolism during hyperbaric oxygen therapy in 33 patients with sudden hearing loss.
What They Found
After 10 days of hyperbaric oxygen (HBO) therapy, plasma lipid peroxidation (LPO) slightly increased, and erythrocyte superoxide dismutase (SOD) and glutathione peroxidase (GSHPx) activities did not significantly change (P > 0.05), though glutathione (GSH) levels significantly decreased (P < 0.05). After 20 days, plasma LPO significantly increased (P < 0.05), and SOD, GSHPx, and GSH levels in erythrocytes all significantly decreased (P < 0.05).
What This Means for Canadian Patients
For Canadian patients, these findings suggest that hyperbaric oxygen therapy for sudden hearing loss might induce significant oxidative stress if continued beyond 20 days. Patients should discuss the optimal duration of HBO therapy with their healthcare providers to balance potential benefits against adverse biochemical changes.
Canadian Relevance
This study has no direct Canadian connection.
Study Limitations
A limitation of this study is its small sample size of 33 patients and its focus on biochemical markers rather than direct clinical outcomes.