Table 2.
Mechanical ventilation details and ventilatory pattern during inhalation
| PSV (n = 8) | VCV (n = 9) | p value | |
|---|---|---|---|
| Sedatives (propofol, mg/h) | 190 (160–252) | 200 (160–260) | 0.622 |
| ETT diameter (mm) | 8.0 (7.5–9.0) | 7.0 (7.5–8.5) | 0.252 |
| 81mKr ventilation distribution | |||
| Right/left lung ratio | 1.13 ± 0.25 | 1.09 ± 0.32 | 0.755 |
| Ventilatory pattern during inhalation | |||
| P peak (cmH2O) | 16 ± 3 | 20 ± 1 | 0.005 |
| V T insp (mL) | 586 ± 117 | 530 ± 95 | 0.292 |
| V T insp (mL/kg IBW) | 8.65 (8.00–8.90) | 8.70 (8.55–9.20) | 0.439 |
| RR (cycle/min) | 14 ± 1 | 18 ± 2 | <0.001 |
| MVinsp (L/min) | 8.01 ± 1.48 | 9.17 ± 0.92 | 0.070 |
| Flowpeak insp (L/min) | 44 ± 8 | 32 ± 4 | 0.002 |
| T insp (s) | 1.15 ± 0.19 | 1.12 ± 0.12 | 0.664 |
| T exp (s) | 3.72 (2.91–3.99) | 2.24 (2.16–2.55) | 0.001 |
| T insp T Tot (%) | 25 (22–34) | 32 (32, 33) | 0.072 |
Data expressed as mean ± SD or median (25–75 % IQR)
P-value in italic is considered significant (p < 0.05)
ETT endotracheal tube, MV minute ventilation, P pressure, RR respiratory rate, T insp inspiratory time, T insp T Tot inspiratory time to breathing cycle time ratio, T exp expiratory time, V T tidal volume