In general, in clinical practice, patients with long-term indwelling urethral catheters usually need to be replaced once every 2 weeks, because replacing the catheter too often is likely to cause infection and increase the pain of patients. Like long-term indwelling catheter patients, in addition to the regular replacement of the catheter, usually pay attention to the perineal health of the patient, to do regular bladder irrigation, but also pay attention to the disinfection of the urethral opening.