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Table 2 Respiratory and hemodynamic parameters before and after the LRM, as a function of the patients’ lung recruitability

From: Respiratory effects of lung recruitment maneuvers depend on the recruitment-to-inflation ratio in patients with COVID-19-related acute respiratory distress syndrome

Parameters

R/I < 0.62

n = 15

R/I ≥ 0.62

n = 15

Pre-LRM

Post-LRM

p value

Pre-LRM

Post-LRM

p value

Crs, mL/ cmH2O

33 [24–47]

35 [25–47]

0.74

33 [27–42]

42 [35–60]

< 0.001

PL,EE, cmH2O

− 2 [− 6 to 2]

2 [− 1 to 5]

0.002

− 4 [− 6 to 2]

1 [− 2 to 3]

< 0.001

PL,EE < 0 cmH2O, n (%)

8 (53)

4 (27)

0.26

9 (60)

4 (27)

0.14

PL,EI, cmH2O

12 [9–17]

14 [10–17]

 > 0.99

15 [11–18]

16 [11–19]

0.96

PL,EI ≥ 25 cmH2O, n (%)

0 (0)

0 (0)

 > 0.99

0 (0)

0 (0)

> 0.99

PaO2/FiO2, mmHg

106 [101–132]

186 [128–192]

0.01

99 [73–131]

106 [98–151]

0.048

PaCO2, mmHg

46 [44–56]

46 [43–56]

0.66

42 [36–48]

46 [38–53]

0.16

VR

2.1 [1.9–2.5]

2.1 [1.8–2.6]

0.88

2.0 [1.5–2.6]

2.0 [1.6–2.4]

0.91

PP, mmHg

70 [55–85]

50 [51–67]

0.01

61 [43–70]

54 [46–70]

0.51

HR, beats/min

96 [73–105]

92 [68–112]

0.56

80 [68–105]

88 [64–96]

0.74

  1. Crs: respiratory system compliance, HR: heart rate, LRM: lung recruitment maneuver, PaO2/FiO2: partial pressure of oxygen to inspired oxygen fraction, PL,EE: transpulmonary pressure at end-expiration, PL,EI: transpulmonary pressure at end-inspiration, PP: pulse pressure, VR: ventilator ratio