The accepted principle of tracheal intubation is to remove it as early as possible, one to avoid complications such as ventilator-associated pneumonia due to prolonged intubation, and the other to relieve the patient’s discomfort and save medical costs. Most patients with tracheal intubation require ventilator-assisted breathing, so the indications for extubation include not requiring ventilator-assisted breathing, being able to breathe autonomously and steadily, and achieving effective oxygen saturation levels. Another indication for extubation can be achieved when the patient is fully awakened and the drug-induced paralysis of the respiratory muscles has completely disappeared, and the tracheal intubation is performed during general anesthesia with ventilator-assisted breathing.