Study on the Correlation Between Tracheotomy Tip Pressure and Esophageal Pressure in Patients Weaned from Tracheotomy

Inclusion Criteria: * Adult patients (≥18 years old), regardless of gender * Tracheostomized patients with spontaneous breathing; * Weaning criteria: under the condition of mask oxygen inhalation at 5L/min, SPO2 \> 94%, PaO2/FiO2 \> 150 - 200. * The patient has stable hemodynamics and pH ≥ 7.32; * Agree to participate in this trial and sign the informed consent form. Exclusion Criteria: * Patients with contraindications for esophageal catheter insertion and unable to monitor esophageal pressure; * Patients with bleeding risks: severe coagulation disorders, esophageal varices； * Local injuries: basilar skull fracture, maxillofacial fracture; * Pregnant women; * Patients considered not suitable by the researcher.