Table 2.
Comparison of the three systems
| AIRVO 2 Constant flow |
Steady air Constant flow |
Vivo 50 Constant pressure |
p Values | |
| Difference in tidal volume (mL) | 221.40±263.92 | 257.30±315.06 | 244.24±268.63 | p>0.99 |
| Difference in PtcCO2 (mm Hg) | −0.50±2.37 | −0.30±1.06 | −0.60±2.32 | p>0.05 |
| Difference in RR (bpm) | −3.26±2.14 | −3.17±4.93 | −4.18±2.68 | p>079 |
| Difference in EIOP (cmH2O) | −3.18±4.70 | −2.04±1.74 | −1.77±2.56 | p>0.85 |
| Difference in EEOP (cmH2O) | −0.51±2.80 | 0.71±2.34 | 1.02±3.99 | p>0.92 |
p Values in comparison between NHF-OTS 30 L/min and baseline.
difference EEOP, difference in end-expiration oesophageal pressure; difference EIOP, difference in end-inspiration oesophageal pressure; PtcCO2, transcutaneous carbon dioxide; RR, respiratory rate.