I am a nursing student, I would like to ask about sputum suction through the endotracheal tube when the suction tube into the endotracheal tube, can not with negative pressure into the

No, gently insert the suction tube to a certain depth without negative pressure and slowly rotate it upward while suctioning, stopping slightly when encountering secretions, avoiding up and down pumping, and avoiding deep and large negative pressure suction, preventing the small holes of the suction tube from sticking directly to the mucous membrane of the trachea, which may cause mucous membrane edema, hemorrhage, and the formation of blood crusts. Excessive negative pressure, too thick, too hard and too deep insertion of the suction tube, too frequent sputum suction, too fast pumping, etc. can cause mucosal damage and bleeding.