Ventilator | No leak | Small leak | Large leak | ||||||
Flow L·s−1 | Paw cmH2O | tI/ttot | Flow L·s−1 | Paw cmH2O | tI/ttot | Flow L·s−1 | Paw cmH2O | tI/ttot | |
BiPAP T | 1.0±0.09 | 18/5 | 0.30 | 2.1±0.1 | 13/5 | 0.30 | 2.4±0.1 | 10/5 | 0.30 |
BiPAP S/T | 1.3±0.09 | 19/6 | 0.43 | 2.1±0.09 | 16/6 | 0.70 | 2.5±0.1 | 12/6 | 0.79 |
MNPB 335 | 1.3±0.09 | 20/5 | 0.33 | 2.5±0.1 | 16/6 | 0.50 | 3.0±0.1 | 12/6 | 0.33 |
Quantum | 1.2±0.09 | 18/5 | 0.33 | 2.5±0.1 | 15/4 | 0.33 | 3.0±0.1 | 12/4 | 0.46 |
O'NYX ACPV | 1.1±0.02 | 18/7 | 0.33 | 2.1±0.04 | 17/6 | 0.33 | 3.4±0.05 | 17/6 | 0.88 |
Siemens PCV | 1.3±0.1 | 16/5 | 0.35 | 1.7±0.1 | 16/2 | 0.35 | 2.4±0.1 | 15/0 | 0.35 |
O'NYX ACV | 0.8±0.1 | 15/0 | 0.25 | 1.0±0.1 | 8/0 | 0.38 | 1.8±0.1 | 4/0 | 0.47 |
PLV 102 | 1.5±0.0 | 20/0 | 0.33 | 1.5±0.0 | 6/0 | 0.33 | 1.5±0.0 | 4/0 | 0.33 |
Siemens ACV | 0.75±0.1 | 20/0 | 0.35 | 0.75±0.1 | 10/0 | 0.35 | 1.0±0.1 | 4/0 | 0.35 |
Data are presented as means±sd. Paw: Peak airway pressure, presented as inspiratory positive airway pressure/expiratory positive airway pressure; tI/ttot: ratio of inspiratory time to total respiratory cycle time; BiPAP: bilevel positive airway pressure; MNPB: Mallinkrodt Nellcor Puritan Bennett; ACPV: assist control pressure ventilation; PCV pressure control ventilation; ACV: assist controlled ventilation
peak inspiratory flow
trigger setting was 1.5 cmH2O.