Table 2 Respiratory mechanics and arterial blood gas
Variables | Whole dataset (n = 99) | Moderate ARDS without ECMO (n = 16) | Severe ARDS without ECMO (n = 59) | Severe ARDS on ECMO (n = 24) |
|---|---|---|---|---|
PEEP—cmH2O | 10 [5–14] | 9 [5–10] | 10 [5–10] | 15 [13–15] a,b |
VT—mL.kg−1 PBW | 5.9 [3.9–6.0] | 6.0 [5.9–6.0] | 6.0 [5.9–6.0] | 1.0 [1.0–1.0] a,b |
RR—min−1 | 22 [16–28] | 23 [20–28] | 25 [22–29] | 5 [5–10] a,b |
PEEPtot,rs—cmH2O | 10 [7–15] | 9 [6–10] | 10 [6–11] | 15 [14–15] a,b |
Pplat,rs—cmH2O | 20 [17–22] | 18 [17–24] | 20 [16–23] | 20 [19–21] |
Ppeak—cmH2O | 29 [25–35] | 30 [28–34] | 32 [27–37] | 22 [21–24] a,b |
ΔPrs—cmH2O | 9 [7–12] | 10 [9–13] | 10 [9–12] | 5 [3–8] a,b |
Ers—cmH2O. L−1 | 33 [25–44] | 29 [22–37] | 28 [23–35] | 70 [53–95] a,b |
pH | 7.38 [7.32–7.44] | 7.37 [7.33–7.42] | 7.37 [7.31–7.41] | 7.46 [7.39–7.47] a,b |
PaO2—Torr | 72 [65–80] | 78 [67–89] | 74 [66–80] | 69 [62–74] a |
FiO2 or FmO2 – % | 90 [60–100] | 50 [44–53] | 90 [65–100] a | 100 [80–100] a |
PaCO2—Torr | 49 [41–54] | 42 [37–51] | 50 [43–58] | 49 [41–51] |
Bicarbonates—mmol.L−1 | 28 [24–32] | 26 [22–28] | 27 [24–31] | 32 [29–34] a,b |
Lactate—mmol.L−1 | 1.7 [1.3–2.2] | 1.5 [1.3–1.9] | 1.6 [1.3–2.2] | 1.9 [1.6–2.4] |