What Researchers Did
Researchers retrospectively analyzed 5,962 patients undergoing long-term HBOT at an Italian hyperbaric unit over 8 years, tracking incidence and severity of middle ear barotrauma (MEB) as a treatment side effect.
What They Found
MEB occurred in 9.2% of all HBOT treatments. Most cases were mild (Grade 1, 69%). Female patients over 50 were most commonly affected. Pre-existing rhinitis and difficulty equalizing ear pressure were strong risk factors. Only 1.49% of all patients had to stop treatment due to MEB.
What This Means for Canadian Patients
Middle ear pressure effects are the most common side effect of HBOT. Canadian patients beginning HBOT should be informed about this risk, and those with upper respiratory infections or a history of ear pressure problems should be assessed before each session. Most cases are mild and resolve without stopping treatment.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
This was a single Italian center study; ear anatomy, patient demographics, and chamber protocols may differ from Canadian settings, affecting generalizability of incidence rates.