Fig. 1

Number of patients included and excluded from the study. A total of 823 patients older than 18 years of age were admitted to the SICU. Among them, 503 patients were not mechanically ventilated during the SICU stay. According to the exclusion criteria, 142 patients were excluded. A total of 178 patients underwent the SBT process; however, 5 patients underwent a tracheotomy. Finally, we analyzed 173 patients and compared the success and failure groups. Most patients (162, 93.6%) were extubated successfully, and 11 (6.4%) failed the extubation. *Fast track extubation: extubation without SBT for patients with good postoperative condition; SICU: surgical intensive care unit; CNS: central nervous system; ICU: intensive care unit; PAV: proportional assist ventilation; SBT: spontaneous breathing trial