| Initial conventional NIV period | NIV-NAVA period | Final conventional NIV period |
---|---|---|---|
NIV settings | |||
NIV mode | 3 CPAP, 5 PSV, 5 PCV | 13 NAVA | 3 CPAP, 5 PSV, 5 PCV |
FiO2 (%) | 35 (27-40) | 30 (25-35) | 33 (30-36) |
Set respiratory rate (n/min) | 14 (10-19) | – | 14 (10-19) |
PEEP (cm H2O) | 6 (5-7) | 6 (5-7) | 6 (5-7) |
Pressure support (cm H2O) | 10 (7-12) | – | 10 (7-12) |
NAVA gain level (cm H2O/μV) | – | 0.4 (0.3-0.6) | – |
Measured respiratory parameters | |||
Respiratory rate (per minute) | 41 (31-64) | 41 (31-61) | 39 (29-63) |
Mean airway pressure (cm H2O) | 12.3 (8.8-14.8) | 10.6 (8.1-14.2) | 11.9 (9.2-14.1) |
Peak EAdi (μV) | 13.4 (6.8-35.1) | 15.1 (10.0-27.9) | 16.1 (7.2-34.4) |
End-expiration EAdi (μV) | 1.1 (0.3-3.3) | 1.2 (0.8-2.8) | 1.7 (0.3-3.3) |
Mean EAdi (μV) | 7.0 (2.2-16.2) | 7.6 (6.2-11.4) | 7.7 (2.3-16.6) |