The air pressure for double-lumen bronchial intubation depends on the choice of double-lumen tube as follows. In case of airway pressure double lumen bronchial catheter, the end of the tube reaches until the target bronchus. 2~6ml of gas is injected into the main tracheal sleeve, the pressure in the posterior sleeve is recommended to be less than 25cmH₂O, and the peak airway pressure is recommended to reach 30cmH₂O during normal ventilation. If 1~3ml of air is injected into the bronchus, the pressure inside the posterior sleeve capsule can be less than 20cmH₂O, and the isolation of both lungs is better when the airway pressure can reach 30cmH₂O after positive pressure ventilation. The specific airway pressure varies somewhat with the choice of different types of double lumen tubes, and the choice regarding the double lumen bronchial lumen depends on gender, height, and personal circumstances. It is advisable to consult your doctor before choosing one and take his or her advice into account. If an accident occurs while performing double-lumen bronchial intubation, it should be stopped promptly.