Characteristics of patients on inclusion in the VEINART study
| All patients n (%) n=113 | Patients with arterial sampling n (%) n=55 | Patients with venous sampling n (%) n=58 | |
| Age (median (min to max)) | 62 (19 to 103) | 69 (19 to 95) | 59 (19 to 103) |
| Male | 56 (49.6) | 29 (52.7) | 27 (46.6) |
| Medical history | |||
| Heart disease | 47 (41.6) | 23 (41.8) | 24 (41.4) |
| Chronic lung disease | 36 (31.9) | 11 (20.0) | 25 (43.1) |
| Neoplastic disease | 11 (9.7) | 9 (16.4) | 2 (3.4) |
| Metabolic disease | 45 (39.8) | 26 (47.3) | 19 (32.8) |
| Hospitalisation after ED consultation | 74 (65.5) | 38 (69.1) | 36 (62.1) |
| Diagnosis hypotheses motivating the blood sampling* | |||
| No lactic metabolic acidosis | 27 (24.1) | 14 (25.5) | 13 (22.8) |
| Lactic metabolic acidosis | 25 (22.3) | 14 (25.5) | 11 (19.3) |
| Metabolic alkalosis | 11 (9.9) | 2 (3.6) | 9 (15.8) |
| Respiratory acidosis | 24 (21.4) | 13 (23.6) | 11 (19.3) |
| Respiratory alkalosis | 25 (22.3) | 12 (21.8) | 13 (22.8) |
| Predictive criterion of difficulty in sampling | |||
| Intravenous drug abuse | 5 (4.4) | 3 (5.5) | 2 (3.4) |
| Others | 4 (3.5) | 2 (3.6) | 2 (3.4) |
| Analgesic within 4 hours previously sampling† | |||
| None | 83 (74.8) | 41 (75.9) | 42 (73.7) |
| Level 1 | 21 (18.9) | 10 (18.5) | 11 (19.3) |
| Level 2 | 5 (4.5) | 2 (3.7) | 3 (5.3) |
| Level 3 | 2 (1.8) | 1 (1.9) | 1 (1.7) |
*One missing data in arterial group.
†Two missing data: one in each group.