| Type of surgery | n | Hydrostatic oedema (n (%)) | ALI (n (%)) | Pneumonia (n (%)) | Atelectasis (n (%)) | Pneumothorax (n (%)) |
| Cardiac | 1381 | 147 (10.6) | 79 (5.7) | 38 (2.7) | 11 (0.8) | 8 (0.6) |
| Thoracic | 659 | 14 (2) | 24 (3.6) | 14 (2) | 6 (0.9) | 3 (0.4) |
| Open abdomen | 547 | 7 (1.2) | 8 (1.5) | 2 (0.4) | 1 (0.2) | 2 (0.4) |
| Orthopaedic | 399 | 12 (3) | 4 (1) | 1 (0.2) | 1 (0.2) | 1 (0.2) |
| Peripheral vascular | 352 | 4 (1) | 2 (0.6) | 1 (0.3) | 0 | 0 |
| Neurological | 339 | 2 (0.6) | 3 (0.9) | 2 (0.6) | 0 | 0 |
| Non-orthopaedic spine | 258 | 2 (0.8) | 0 | 0 | 1 | 0 |
| Aortic vascular | 148 | 23 (15) | 11 (7.4) | 6 (4) | 0 | 0 |
| Laparoscopic abdominal | 123 | 2 (1.6) | 1 (0.8) | 1 (0.8) | 1 (0.8) | 0 |
| Urological | 158 | 3 (1.8) | 0 | 0 | 0 | 0 |
| Head and neck | 24 | 1 (4) | 1 (4) | 2 (8) | 0 | 0 |
| General | 33 | 0 | 0 | 0 | 0 | 0 |
| Total (%) | 4420 | 217 (4.9) | 133 (3) | 67 (1.5) | 21 (0.5) | 14 (0.3) |
ALI, acute lung injury.