Table 1.
Criteria for the SBT process
| Entry criteria | |
| SpO2 | ≥ 94% with FiO2 ≤ 0.5, PEEP ≤ 7 cmH2O, support of WOB ≤ 40% |
| PaO2 | ≥ 70 mmHg |
| Respiratory acidosis | No acidosis |
| Heart rate | ≤ 120 bpm |
| Dopamine | ≤ 5 mcg/kg/min |
| Dobutamine | ≤ 5 mcg/kg/min |
| Noradrenaline | ≤ 0.05 mcg/kg/min |
| Hemoglobin | ≥ 8 g/dl |
| Electrolyte abnormality | No abnormality |
| Extubation criteria | |
| Consciousness | |
| Richmond Agitation-Sedation Scale | − 2 to 0 |
| Confusion assessment method for the ICU | Negative |
| Respiration | |
| Respiratory rate | ≤ 30/min |
| RSBI | < 105 |
| Labored breathing | No |
| Increased WOB | No |
| Gas exchange | |
| SpO2 | ≥ 94% |
| PaO2 | ≥ 70 mmHg |
| pH | ≥ 7.32 |
| PaCO2 | ≤ 45 mmHg |
| Circulation | |
| Heart rate | ≤ 120/min |
| Systolic blood pressure | 80 to 180 mmHg |
SBT spontaneous breathing trial, FiO2 inspired oxygen fraction, PEEP positive end-expiratory pressure, WOB work of breathing, SpO2 arterial oxygen saturation, PaO2 partial pressure of arterial oxygen, RSBI rapid shallow breathing index, PaCO2 partial pressure of arterial carbon dioxide