Objective To discuss the methods for preventing the block of disposable tracheal catheter and to solve the nursing problem of sputum scab blocking the catheter. Methods The control group( 41 cases)received routine care after tracheotomy catheter care. The observation group( 40 cases) received the endotracheal tube nursing routine. After using the liquid paraffin,the inner wall of the disposable trachea catheter was treated with oil. Results Observation group: the occurrence rate of sputum scab was 7. 3% and...