PBW-guided ventilation | ΔP-guided ventilation | p | |
---|---|---|---|
FiO2, % | 50 [40–60] | 50 [40–60] | 1.00 |
PEEP, cm H2O | 10 [8–12] | 10 [8–12] | 1.00 |
Tidal volume, mL/kg PBW | 6.1 [5.9–6.2] | 7.7 [6.2–8.7] | < 0.001 |
Respiratory rate, breaths/min | 29 [26–32] | 21 [16–28] | < 0.001 |
Minute ventilation, L/min | 11.3 [9.7–12.7] | 10.2 [8.9–11.6] | < 0.001 |
EtCO2, mm Hg | 30 [27–36] | 30 [27–37] | 0.16 |
Plateau pressure, cm H2O | 22 [19–25] | 24 [22–26] | < 0.001 |
Auto-PEEP, cm H2O | 1 [1–1.25] | 1 [0–1] | 0.002 |
Driving pressure, cm H2O | 10 [9–13] | 13 [12–14] | < 0.001 |
Airways resistance, cm H2O/L/s | 13 [9–16] | 13 [9–16] | 0.71 |
Respiratory system compliance, mL/cm H2O | 38 [27–48] | 40 [27–48] | 0.15 |
Mechanical power, J/min | 31.5 [28–35.7] | 28.8 [24.6–32.6] | < 0.001 |
Elastic power, J/min | 18.4 [15.1–20.9] | 16.6 [13.7–20.9] | < 0.001 |
Resistive power, J/min | 14.1 [9.9–16.6] | 12.0 [9.7–13.8] | < 0.001 |
NorMP, J/min/kg | 0.50 [0.43–0.58] | 0.46 [0.36–0.55] | < 0.001 |
SpO2, % | 96 [93–97] | 95 [94–97] | 0.72 |
PaO2/FiO2 | 126 [107–157] | 135 [104–172] | 0.005 |
PaCO2, cm H2O | 42 [37–48] | 42 [35–48] | 0.07 |
Alveolar dead space, % | 26 [16–34] | 29 [15–34] | 0.07 |
Ventilatory ratio | 1.97 [1.66–2.46] | 1.77 [1.40–2.27] | < 0.001 |
Heart rate, beats/min | 71 [64–85] | 72 [63–88] | 0.34 |
Mean arterial pressure, mm Hg | 80 [72–88] | 81 [71–88] | 0.61 |
Lactate, mmol/L | 1.4 [1–2.2] | 1.5 [1–2.1] | 0.70 |
Transthoracic echocardiography (n = 24) | |||
Cardiac output, L/min | 4.2 [3.6–4.8] | 4.1 [3.8–5.1] | 0.97 |
RV surface, cm2 | 15 [13–17] | 15 [13–17] | 0.76 |
RV/LV ratio | 0.60 [0.50–0.61] | 0.60 [0.51–0.68] | 0.74 |
Tricuspid S’ wave, cm/s | 15.5 [11.3–17.5] | 14.2 [11.1–17] | 0.02 |
TAPSE, mm | 19 [17–22] | 20 [17–23] | 0.10 |
PAPs, mm Hg | 38 [31–46] | 38 [29–42] | 0.28 |
Inferior vena cava, mm | 22 [16–24] | 21 [18–23] | 0.73 |