Table 3.
Study outcomes.
| HFNO n = 40 |
FMO n = 40 |
p | |||
|---|---|---|---|---|---|
| Desaturation (lowest SpO2 < 92%) | 2 | (5.0) | 10 | (25.0) | 0.0122 |
| Lowest SpO2 during intubation, % | 99 | 97–100 (81–100) |
96 | 92–100 (80–100) |
0.0150 |
| PaO2 after preoxygenation, mm Hg | 476 | 390–541 (260–620) |
397 | 351–456 (210–632) |
0.0010 |
| PaCO2 after preoxygenation, mm Hg | 41.5 | 36.0–43.9 (22.7–53.1) |
42.2 | 35.9–47.3 (26.3–58.1) |
0.2076 |
| SpO2 after preoxygenation, % | 100 | 100–100 (98–100) |
100 | 100–100 (97–100) |
0.9933 |
| Comfort level on 10-point Likert scale | 8 | 7–10 (2–10) |
8 | 8–9 (6–10) |
0.7118 |
Values are counts (percent) or median (interquartile range; minimum and maximum). Abbreviations: FMO, facemask oxygenation; HFNO, high-flow nasal oxygenation; PaO2, partial pressure of arterial oxygen; PaCO2, partial pressure of arterial carbon dioxide; SpO2, peripheral capillary oxygen saturation.