What Researchers Did
In a prospective, single-centre, observational study, researchers documented changes in oxygenation and ventilator settings in 25 mechanically ventilated ICU patients following 61 hyperbaric oxygen treatments.
What They Found
Following hyperbaric oxygen treatment (HBOT), the P(a)O2/F(i)O2 ratio decreased by 27% immediately post-treatment (P < 0.001) and 22% at 1 hour (P < 0.001), returning to baseline by 3 hours. These changes necessitated adjustments to ventilation parameters in 30 of 61 HBOT sessions across 17 of 25 patients, most commonly increasing F(i)O2 by a mean of +0.17 for two hours.
What This Means for Canadian Patients
Canadian patients receiving hyperbaric oxygen therapy while mechanically ventilated may experience temporary reductions in oxygenation. Close monitoring and potential adjustments to ventilator settings will be crucial to maintain adequate oxygen levels after treatment.
Canadian Relevance
This study has no direct Canadian connection as it was not conducted in Canada or by Canadian researchers.
Study Limitations
This was a single-centre observational study with a relatively small sample size, limiting the generalizability of the findings.