Table 3.
Pulmonary function test, arterial blood gas analysis, and 6-min walk distance of severe ARDS survivors according to ECMO status, 1 year after hospital discharge
| Parameters | ECMO survivors (n = 24) | Non-ECMO survivors (n = 48) | t values | P |
|---|---|---|---|---|
| Pulmonary function test (% predicted) | ||||
| FEV1 | 85.6 ± 8.6 | 83.0 ± 19.1 | 0.634 | 0.528 |
| FVC | 82.4 ± 8.9 | 80.5 ± 18.0 | 0.487 | 0.628 |
| FEV1/FVC | 108.6 ± 9.4 | 104.8 ± 13.1 | 1.266 | 0.210 |
| PEFR | 79.2 ± 17.7 | 82.2 ± 24.7 | −0.530 | 0.598 |
| MVV | 88.5 ± 16.7 | 79.1 ± 21.3 | 1.889 | 0.063 |
| DLco | 72.3 ± 6.3 | 72.4 ± 6.0 | −0.066 | 0.948 |
| Arterial blood-gas values | ||||
| pH | 7.42 ± 0.04 | 7.41 ± 0.04 | 1.000 | 0.321 |
| PaO2 (mmHg) | 99.6 ± 13.4 | 97.4 ± 14.3 | 0.628 | 0.532 |
| PaCO2 (mmHg) | 39.8 ± 4.3 | 39.6 ± 5.5 | 0.156 | 0.877 |
| P(A-a)O2 (mmHg) | 10.8 ± 8.2 | 12.7 ± 7.6 | −0.974 | 0.333 |
| Distance walked in 6 min (m) | 530.6 ± 83.6 | 495.0 ± 90.1 | 1.618 | 0.110 |
| % predicted | 81.3 ± 12.9 | 78.3 ± 13.2 | 0.916 | 0.363 |
Data are expressed as mean ± SD. 1 mmHg = 0.133 kPa. ECMO: Extracorporeal membrane oxygenation; FEV1: Forced expiratory volume in 1 s; FVC: Forced vital capacity; PEFR: Peak expiratory flow rate; MVV: Maximal minute ventilation; DLco: Carbon monoxide diffusion capacity; P(A-a)O2: Alveolar arterial oxygen partial pressure difference; ARDS: Acute respiratory distress syndrome; SD: Standard deviation.