“…The first step is to establish whether there is any involvement of surgical complications, such as anastomotic leakage, in particular with regard to the potential respiratory consequences. 27 This hypothesis requires that a surgeon be consulted; chest drainage discharge be examined for abnormalities; a methylene blue test through the nasogastric tube be carried out; computed tomography examinations of the chest be performed to identify mediastinitis or pleural empyema; and, if clinical status implies reintubation, a fibroscopic assessment of anastomotic status must be carried out. Once a surgical cause has been eliminated, the practitioners in charge of the patient need to promote respiratory rehabilitation with optimal analgesic control to ensure correct oxygenation.…”