Respiratory rate gap and respiratory variables compared at both stages
| STD* | MNM* | p Value† | |
|---|---|---|---|
| dRR (infl/min) | 44 (31–52) | 50 (40–60) | 0.099 |
| RR Gap (infl/min) | 11.6 (4.7–18.3) | 0.2 (0.1–0.4) | <0.001 |
| Ti (s) | 0.44 (0.32–0.72) | 0.33 (0.28–0.41) | 0.006 |
| Te (s) | 0.92 (0.56–1.24) | 0.78 (0.67–0.95) | 0.282 |
| I/E ratio | 0.5 (0.34–0.64) | 0.4 (0.29–0.6) | 0.035 |
| VT (mL) | 32 (28–38) | 28 (24–35) | 0.008 |
| MV (L/min) | 1.5 (1.19–1.65) | 1.5 (1.18–1.74) | 0.475 |
| PIP (cm H2O) | 27.6 (20–30) | 26.7 (20–31) | 0.671 |
| MAP (cm H2O) | 7.4 (5.5–9.9) | 6.7 (4.3–9.8) | 0.005 |
| dRR CV (%) | 42.2 | 17.7 | – |
*Median (IQR).
†Wilcoxon paired signed rank test.
CV, coefficient of variation; dRR, delivered respiratory rate; MAP, mean airway pressure; MNM, Metronome Stage; MV, minute ventilation; PIP, peak inspiratory pressure; RR, respiratory rate; STD, Standard Stage; Te, expiratory time; Ti, inspiratory time; VT, tidal volume.