There are more types of drainage, take closed chest drainage as an example, if the amount of drainage is equal to or less than 50ml, and there is no abnormality in other examinations, the tube can be removed. There are more types of drainage, take the more common closed chest drainage as an example. If the patient’s drainage flow is equal to, or equal to 50ml, chest radiographs show good lung expansion, no air leakage and no obvious symptoms of respiratory distress, the tube can be removed according to the doctor’s instructions. After extubation, the patient should be closely observed for dyspnea, subcutaneous hematoma and other symptoms, and if discomfort occurs, it should be treated in time. However, if the patient’s drainage flow is less than 50 ml, but there are still symptoms such as dyspnea, it is not advisable to pull out the tube. Thoracic closed drainage is also a frequently used treatment in the clinic, and the indications may include pneumothorax, hemothorax, and postoperative open heart surgery. The question of whether 50ml of drainage per day can be extubated also needs to be judged according to the drainage tubes in different parts of the body. If there is any doubt about this, it is recommended to consult a specialized doctor.