Characteristic | Group | Pre-5 min (n = 392/396) | The lowest SpO2, the highest respiratory rate, heart rate, and mean arterial pressure (n = 392/396) | Post-5 min (n = 392/396) | Post-10 min (n = 392/396) | Post-2 h (n = 392/396) | Post-6 h (n = 392/396) | Post-24 h (n = 392/396) | pa |
---|---|---|---|---|---|---|---|---|---|
SpO2 (%) | MHFNC | 97.4 ± 1.6 | 94.1 ± 3.2 | 95.4 ± 2.3 | 94.7 ± 2.7 | 95.5 ± 1.8 | 95.7 ± 1.8 | 96.0 ± 1.7 | < 0.001 |
 | Control | 97.3 ± 1.5 | 90.5 ± 3.8 | 92.1 ± 2.6 | 93.4 ± 2.9 | 95.3 ± 2.1 | 95.7 ± 1.9 | 95.9 ± 1.8 | < 0.001 |
 | pc | 0.268 | < 0.001 | < 0.001 | < 0.001 | 0.348 | 0.869 | 0.493 | 0.003b |
Respiratory rate (bpm) | MHFNC | 17 ± 5 | 26 ± 7 | 19 ± 5 | 19 ± 4 | 18 ± 3 | 17 ± 3 | 17 ± 3 | < 0.001 |
 | Control | 18 ± 4 | 28 ± 6 | 21 ± 5 | 20 ± 4 | 18 ± 3 | 17 ± 3 | 17 ± 3 | < 0.001 |
 | pc | 0.196 | < 0.001 | < 0.001 | 0.005 | 0.693 | 0.694 | 0.973 | 0.001b |
Heart rate (beats/min) | MHFNC | 84 ± 15 | 112 ± 18 | 94 ± 16 | 93 ± 16 | 83 ± 10 | 82 ± 10 | 81 ± 10 | < 0.001 |
 | Control | 83 ± 15 | 116 ± 21 | 97 ± 18 | 94 ± 16 | 82 ± 10 | 81 ± 11 | 80 ± 10 | < 0.001 |
 | pc | 0.305 | 0.015 | 0.037 | 0.377 | 0.167 | 0.818 | 0.334 | 0.465b |
Mean arterial pressure (mmHg) | MHFNC | 95 ± 13 | 108 ± 15 | 102 ± 14 | 104 ± 17 | 95 ± 10 | 94 ± 10 | 94 ± 9 | < 0.001 |
 | Control | 94 ± 12 | 110 ± 18 | 103 ± 16 | 104 ± 16 | 96 ± 10 | 95 ± 10 | 94 ± 10 | < 0.001 |
 | pc | 0.454 | 0.256 | 0.233 | 0.890 | 0.541 | 0.342 | 0.580 | 0.402b |