| NPPV (n = 28) | IMV (n = 37) | PA | NPPV (n = 28) | IMV (n = 37) | PB |
---|---|---|---|---|---|---|
 | First minute |  | Final |  | ||
Respiratory rate (f), ipma | 27.7 ± 5.7 | 30.05 ± 8.6 | 0.23 | 39.0 ± 2.8b | 38.0 ± 3.1b | 0.19 |
Tidal volume (VT), mL | 389 ± 0.25 | 399 ± 0.28 | 0.51 | 278 ± 0.24b | 268 ± 0.27b | 0.46 |
f/VT | 82.6 ± 45 | 87.6 ± 54.4 | 0.50 | 149.0 ± 67.9b | 151.3 ± 58.4b | 0.23 |
Heart rate, bpma | 95.7 ± 13.6 | 101.4 ± 20.3 | 0.57 | 108.4 ± 12.6b | 116.1 ± 14.4b | 0.77 |
SpO2a | 95.1 ± 1.92 | 96.6 ± 1.97 | 0.15 | 88.2 ± 2.4 | 87.3 ± 2.6 | 0.09 |