Steps of catheter removal: I. Inform the patient of the need to perform the operation of catheter removal, so that the patient can relax his psychological fear and cooperate with the medical operation as much as possible. Second, adopt a supine position, fully expose the external genital area, and disinfect the external genital area using iodophor swabs, routinely disinfecting it two times. Third, pick up the balloon end of the urinary catheter, use a 20 ml syringe to pump the air sac of the urinary catheter clean, the liquid of the air sac is about 10-15 ml of saline, pumping until it is not pumped, to avoid causing the air sac to be pumped unclean, resulting in difficulty in pulling out the catheter or failure in pulling out. Fourth, gently pull the catheter, so that the natural bend of the urethra smoothly pull out the urethra. There will be a slight pain during this process, and patients are advised to avoid excessive force to avoid causing urethral spasm, which may lead to increased pain or failure to pull out the catheter. V. After the catheter is removed, the external urethral opening is disinfected again to complete the operation of catheter removal.