Patient characteristics
| Patients | 10 |
| Age years | 56 (51–65) |
| Male | 4 (40) |
| Caucasian | 10 (100) |
| Diagnosis | |
| ARDS | 6 (60) |
| Hypercapnia | 2 (20) |
| Cardiogenic shock | 1 (10) |
| Pulmonary embolism | 1 (10) |
| Type of extracorporeal circulation | |
| ECMO | 8 (80) |
| Oxygen flow rate L·min−1 | 62.4±1.3 |
| ECCO2R | 2 (20) |
| Oxygen flow rate L·min−1 | 5.2±1.3 |
| Respiratory variables | |
| Minute ventilation L·min−1 | 8.0±2.9 |
| Tidal volume mL | 412±158 |
| PEEP cmH2O | 11±4.5 |
| ICU LOS days | 36 (35–57) |
| Duration of eNose monitoring h | 73 (72–113) |
Data are presented as median (interquartile range), n (%) or mean±sd. ARDS: acute respiratory distress syndrome; ECMO: extracorporeal membrane oxygenation; ECCO2R: extracorporeal carbon dioxide removal; PEEP: positive end-expiratory pressure; ICU: intensive care unit; LOS: length of stay.