What Researchers Did
Researchers examined retinal electrophysiological function and thickness in healthy eyes of six subjects before and after hyperbaric oxygen (HBO) exposure using multifocal electroretinography (mfERG) and optical coherence tomography (OCT).
What They Found
They found that P1 implicit times of the mfERG were significantly shorter after HBO, with a 2.65% reduction observed one week later (p = 0.032) and remaining 2.49% shorter one month after treatment (p = 0.020). This delayed response was primarily in the foveal and parafoveal regions, with no changes in mfERG amplitudes or retinal thickness.
What This Means for Canadian Patients
This study suggests that hyperbaric oxygen therapy may induce a delayed, sustained improvement in retinal electrical function, particularly in the central retina. Canadian patients undergoing HBO for other conditions might experience similar retinal changes, which could be beneficial or require further monitoring.
Canadian Relevance
This study has no direct Canadian connection.
Study Limitations
A significant limitation of this study is its very small sample size of six subjects, which restricts the generalizability of the findings.