Table 3 Ventilator, ECMO and arterial blood gas parameters before and after prone positioning in the prone group

Heart rate (beats/min)

103 ± 22

98 ± 22

0.003^b

Systolic pressure (mmHg)

131 ± 20

125 ± 21

< 0.001^b

Diastolic pressure (mmHg)

63 ± 12

63 ± 12

0.429

Mean arterial pressure (mmHg)

86 ± 13

83 ± 13

0.016^a

Blood flow (L/min)

4.09 ± 0.75

3.98 ± 0.82

< 0.001^b

FiO₂ of ECMO

1

1

1

FiO₂ of ventilator

0.45 (0.40–0.55)

0.45 (0.40–0.50)

0.004^b

Tidal volume (mL/kg)

7.48 (5.43–10.70)

7.01 (5.23–8.95)

0.009^b

Plateau pressure (cmH₂O)

22 (19–25)

22 (19–24)

0.360

PEEP (cmH₂O)

10 ± 3

10 ± 3

0.546

Respiratory rate (breaths/min)

21 (15–28)

20 (15–26)

0.359

pH

7.41 ± 0.06

7.41 ± 0.057

0.131

PaO₂ (mmHg)

73.20 (63.75–86.40)

76.40 (64.60–91.40)

0.009^b

PaO₂/FiO₂ (mmHg)

158.00 (122.93–210.33)

174.50 (132.40–228.25)

< 0.001^b

PaCO₂ (mmHg)

44.50 (10.90–47.75)

43.80 (40.40–47.40)

0.132

Lac (mmol/L)

1.9 (1.4–2.6)

1.7 (1.3–2.6)

0.495