From: Driving pressure during proportional assist ventilation: an observational study
Ventilation parameters | All patients total analyzed period | 18 periods of high ΔP versus the rest of the analyzed period (low-ΔP) from eight patients | |
---|---|---|---|
Low-ΔP period | High-ΔP period | ||
FiO2(%) | 40 (30–50)* | 40 (35–50) | 40 (35–50) |
PEEP (cmH2O) | 8 (6–8) | 8 (8–10) | 8 (7–8) |
PaO2/FiO2 | 239 (182–280)* | 246 (174–269)# | 213 (149–237) |
PAV+ % assist | 40 (25–50) | 40 (25–50) | 45 (30–50) |
Respiratory Rate (breaths per min) | 23 (20–27) | 24 (22–28) | 25 (22–29) |
VT mL/kg IBW | 7.3 (6.5–8.3) | 7.3 (7–7.9)# | 7.6 (7.3–8.1) |
VE (L/min) | 10.2 (8.7–11.2) | 10.2 (9.1–11.4) | 10.1 (8.6–11.9) |
RTOT(cmH2O/L/s) | 9.5 (8.3–12)* | 10.8 (8.7–13)# | 12.5 (8.8–15.7) |
RPAV(cmH2O/L/s) | 6.2 (4.6–8.6) | 7.9 (3.5–9.2) | 7.7 (5.8–10.5) |
PEEPi (cmH2O) | 0.3 (0.1–0.7) | 0.3 (0–0.5) | 0.2 (0.1–0.8) |
Crs (mL/cmH2O) | 56 (42–71)** | 38 (32–45)## | 27 (24–30) |
Ti (sec) | 0.89 (0.80- 1.04)* | 0.85 (0.77–0.97) | 0.81 (0.70–0.85) |
WOB (J/L) | 0.9 (0.8–1.1)** | 1.1 (0.9–1.3)## | 1.5 (1.2–1.7) |
ΔP (cmH2O) | 7.8 (6.3–9.9)** | 12 (10.2–12.3)## | 15.6 (15.1–16.1) |