Urinary catheter For short-term indwelling (1~3 days), disinfect the urethral orifice with iodine twice a day and change the drainage bag daily. For long-term indwelling (more than 3 days), bladder flushing is performed twice a day, the urethral orifice is disinfected twice a day, the urethra is changed once a week, and the volume, color and quality of urine are observed and recorded. Train bladder function, clamp the urinary catheter and open it every 4 hours. Continuous bladder irrigation and drainage During the process of irrigation, closely observe whether the drip rate of irrigation is consistent with the drip rate of outflow, if the flow also slows down, it means that there is an obstruction, and the irrigation should be slowed down or stopped, and the drainage tube should be squeezed and squeezed by hand. If the color of the drainage fluid gradually becomes clear, it is normal, if the color of the drainage fluid deepens, or even a large amount of bright red fluid, it means that there is heavy bleeding and the doctor should be notified immediately; adjust the drip rate of flushing according to the color of the outflow; change the flushing bottle and disinfect the urethral opening twice a day.