What Researchers Did
Researchers conducted a randomised controlled study to compare noninvasive positive pressure ventilation (NPPV) with spontaneous ventilation (SV) for preoxygenation in morbidly obese patients.
What They Found
A significantly larger proportion of patients achieved 95% end-tidal oxygen (ETO2) at 5 minutes with NPPV compared to SV (13/14 vs 7/14, P = 0.01). The time to reach maximal ETO2 was also significantly shorter in the NPPV group (185 ± 46 s vs 222 ± 42 s, P = 0.02), and the mean ETO2 at the conclusion of oxygen administration was higher (96.9 ± 1.3% vs 94.1 ± 2.0%, P < 0.001).
Canadian Relevance
This study was not conducted in Canada and has no direct Canadian connection.
Study Limitations
The study was conducted at a single center with a specific patient population, which may limit the generalizability of the findings.