What Researchers Did
Researchers retrospectively evaluated the effect of secondary hyperbaric oxygen therapy (HBO) at two different pressures (1.5 ATA and 2.5 ATA) in patients with idiopathic sudden sensorineural hearing loss after conventional treatment failed, comparing them to a group receiving no further treatment.
What They Found
Patients receiving secondary HBO at 2.5 ATA showed significantly improved hearing compared to those receiving no further treatment or HBO at 1.5 ATA. Specifically, the mean hearing gain was 19.7 dB in the 2.5 ATA group, compared to 2.6 dB in the no-treatment group and 3.1 dB in the 1.5 ATA group. A shorter time delay before HBO also correlated with higher hearing gain.
What This Means for Canadian Patients
For Canadian patients experiencing idiopathic sudden sensorineural hearing loss that does not respond to initial conventional treatments, secondary hyperbaric oxygen therapy at 2.5 ATA may offer a significant improvement in hearing. This could provide a valuable additional treatment option for those seeking to regain lost hearing.
Canadian Relevance
This study has no direct Canadian connection as it was conducted by researchers outside of Canada.
Study Limitations
A key limitation of this study is its retrospective design, which may introduce biases and limit the generalizability of the findings.