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Table 2 Comparison of ventilatory parameters between conventional manual ventilation and guided ventilation with VFD in the ALS and BLS groups (mean ± SD)

From: Ventilation feedback device for manual ventilation in simulated respiratory arrest: a crossover manikin study

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