Before the catheter is removed, the contraction function of the bladder forcing muscle is exercised by practicing holding the urine, practicing contracting the abdominal muscles to squeeze the bladder, and practicing the pelvic floor muscles to increase the urinary pressure. 1. Practicing holding urine: practicing holding urine is to let the bladder fill up by intermittently jamming the catheter, so that the time of urination becomes longer. When the bladder feels the pressure, it will be transmitted to the cerebral cortex, so as to achieve the purpose of urination. 2. Practice contracting the abdominal muscles to squeeze the bladder: Practice contracting the abdominal muscles and squeezing the bladder hard to soothe yourself and feel the process of urination through intention, ignoring the presence of the catheter. 3. Exercise pelvic floor muscles to increase urinary pressure: Exercise the pelvic floor muscles, 30 repetitions per set, three sets at a time, feel the contraction of the urethra and conduct it to the bladder to increase urinary pressure. Bladder function training should be carried out before removing the urinary catheter, the purpose is that after removing the urinary catheter, the normal physiological function of urination can be restored smoothly. Generally, after the extraction of urinary catheter, drink more water, urinate diligently, pay attention to urination, and if there is any discomfort, repeat the consultation in time.