Table 1 Patients baseline and mortality

 Age [years]

57 ± 9

 Female/male

13/7

 SAPS II at admission

37 ± 6

 Body mass index

27.1 ± 7.6

 Home NIV before

8/20

 Long-term oxygen therapy before

12/20

 Known history of severe COPD

20/20

 pH before ECCO₂R (invasive mechanical ventilation)

7.19 ± 0.06

 PaCO₂ before ECCO₂R [mmHg]

96.2 ± 20.5

 HCO3⁻ before ECCO₂R [mmol/l]

30.5 ± 6.2

 ECCO₂R blood flow day 1 [l/min]

2.1 ± 0.8

 Sweep gas flow day 1 [l/min]

4.5 ± 1.9

 ECCO₂R blood flow day before protocol [l/min]

1.0 ± 0.2

 Sweep gas flow day before protocol [l/min]

10 ± 0.5

 Retroperitoneal hematoma

2

 Hematothorax

1

 Pulmonary bleeding

2

 90-day mortality

15%

 180-day mortality

25%