Table 2 Ventilator settings, physiological data, and blood gas analysis in each section
During SBT | Noninvasive ventilation | P value* | ||
|---|---|---|---|---|
Previous method | Novel method | |||
Ventilation mode | 1.000 | |||
PSV, n (%) | NA | 50 (83.3) | 51 (85.0) | |
CPAP, n (%) | NA | 10 (16.7) | 9 (15.0) | |
FIO2, median (IQR) | 0.3 (0.3–0.4) | 0.3 (0.3–0.4) | 0.3 (0.3–0.4) | 1.000 |
PEEP, median (IQR), cmH2O | 5 (5–5) | 4 (4–4) | 4 (4–4) | 1.000 |
PS, median (IQR), cmH2O† | 5 (5–5) | 4 (2–4) | 4 (2–4) | 1.000 |
Heart rate, mean (SD), bpm | 85.0 (15.5) | 85.0 (14.7) | 85.5 (15.1) | 0.351 |
Mean blood pressure, mean (SD), mmHg | 81.2 (11.6) | 82.1 (11.6) | 80.5 (11.6) | 0.063 |
Respiratory Rate, mean (SD), breaths /min | 15.9 (4.9) | 18.2 (5.8) | 19.1 (6.1) | 0.108 |
Tidal Volume, mean (SD), mL | 528 (157) | 469 (130) | 474 (122) | 0.692 |
Minute ventilation, mean (SD), L/min | 7.9 (2.3) | 8.1 (3.2) | 8.6 (3.3) | 0.084 |
RSBI, mean (SD) | 33.6 (16.1) | 43.1 (20.4) | 42.9 (17.0) | 0.939 |
Total leakage, mean (SD), L/min | NA | 45.1 (11.5) | 36.1 (8.3) | < 0.001 |
PaO2, median (IQR), mmHg | 87.3 (77.5–100.0) | 86.2 (76.0–100.5) | 89.6 (75.9–97.9) | 0.793 |
P/F ratio, median (IQR) | 290 (214–364) | 271 (216–335) | 280 (211–342) | 0.601 |
PaCO2, mean (SD), mmHg | 37.6 (5.7) | 38.2 (5.5) | 38.4 (5.4) | 0.286 |
PETCO2, mean (SD), mmHg | 35.1 (5.8) | 32.0 (6.3) | 35.7 (5.5) | < 0.001 |
pH, mean (SD) | 7.43 (0.05) | 7.42 (0.05) | 7.42 (0.05) | 0.610 |