Table 2.
Arterial blood gases and respiratory mechanics. Data are means (standard deviation) or medians (quartiles)
| Failed weaning (n = 23) | Successful weaning (n = 41) | p value | |
|---|---|---|---|
| P/F ratio | 296.7 (75.4) | 338 (87.4) | 0.09 |
| PaCO2 (mmHg) | 34 (28,36) | 31 (28.5, 35.5) | 0.18 |
| pH | 7.47 (0.07) | 7.45 (0.07) | 0.66 |
| HCO3 (mEq L−1) | 26.4 (5.7) | 23.7(4.6) | 0.14 |
| Lactate (mmol L−1) | 1.3 (1, 1.8) | 1.3 (0.9, 1.65) | 0.69 |
| RSBI | 40 (29, 60) | 40 (29.3, 56) | 0.87 |
| Minute ventilation (L min−1) | 9.8 (2.7) | 9.1 (2.4) | 0.22 |
| Compliance (dynes) | 67 (45, 91) | 62.8 (44.5, 60) | 0.69 |
| TFC (kΩ−1) | 61 (26) | 45 (14) | 0.002* |
P/F ratio PaO2/fraction of inspired oxygen, TFC thoracic fluid content, RSBI rapid shallow breathing index
*Denotes statistical significance