Long-term catheterization of the elderly need to pay attention to the appropriate amount of water, to keep the urethral opening clean, regular replacement of urinary catheters and bags, pay attention to the observation of urinary catheters and drainage bags, urinary catheters can not be pulled out by themselves and so on. 1. Drink more water in moderation: keep drinking 2000~2500 ml of water per day to keep the urinary tract open. 2. Keep the urethra clean: you can scrub the vulva with a clean towel or clean the urethra with iodophor daily. 3. Change the urinary catheter and bag regularly: reduce the risk of urinary tract infection. 4. Observe the condition of the urinary catheter and drainage bag: the drainage bag should be below the level of the bladder to prevent reflux; pay attention to preventing the urinary catheter from bending and folding and causing obstruction; pay attention to observing the color, nature, and volume of urine; pay attention to whether the urinary catheter is dislodged or clogged. 5. Do not pull out the urinary catheter by yourself: If you need to replace the urinary catheter, you need to go to the hospital in time to be handled by the doctor, and you should not pull out the catheter by yourself to avoid adverse consequences such as urethral injury. Long-term insertion of urinary catheters in the elderly if the discomfort or abnormal symptoms, need to consult a doctor in time, the doctor to carry out targeted treatment or treatment.