Three nursing volunteers came to the patient's home after work. It turns out that the old man has been in bed for a long time and his arthritis is serious. The slightest movement is unbearable. Therefore, it is very inconvenient to replace the catheter in the hospital after the catheter expires, but the catheter must be replaced in time, otherwise it may cause urinary tract infection, and the family members have no choice but to turn to Zhaoyuan People's Hospital for help.