Table 2 Comparison of ventilatory parameters between conventional manual ventilation and guided ventilation with VFD in the ALS and BLS groups (mean ± SD)
Variable | Conventional ALS group (n = 1382 cycles) | VFD ALS group (n = 1030 cycles) | p-value | Conventional BLS group (n = 1647 cycles) | VFD BLS group (n = 1053 cycles) | p-value |
|---|---|---|---|---|---|---|
Ventilation rate (min− 1) | 16.2 ± 6.9 | 10.7 ± 1.1 | < 0.001 | 18.2 ± 5.0 | 10.8 ± 1.1 | < 0.001 |
Tidal volume (ml) | 549 ± 153 | 529 ± 43 | < 0.001 | 471 ± 155 | 451 ± 86 | < 0.001 |
Inspiratory time (s) | 1.2 ± 0.4 | 1.3 ± 0.5 | < 0.001 | 1.2 ± 0.3 | 1.3 ± 0.5 | < 0.001 |
Expiratory time (s) | 3.1 ± 1.5 | 4.3 ± 0.5 | < 0.001 | 2.4 ± 1.0 | 4.2 ± 0.6 | < 0.001 |
I/E ratio | 0.5 ± 0.2 | 0.3 ± 0.1 | < 0.001 | 0.6 ± 0.2 | 0.3 ± 0.3 | < 0.001 |
Peak airway pressure (cmH2O) | 10.7 ± 4.0 | 8.9 ± 1.1 | < 0.001 | 8.8 ± 2.9 | 7.6 ± 1.6 | < 0.001 |