Peritoneal dialysis has the advantages of safety, simple operation, little pain, and little impact on work and life. 1. Hemodynamic stability and small changes during dialysis make peritoneal dialysis relatively safe for elderly patients with low blood pressure, unstable angina and cardiovascular complications. 2. Peritoneal dialysis continues smoothly for 24 hours, and imbalance syndrome rarely occurs. 3. There is no need to establish vascular access, so it is easy to operate; and it can be treated at home, which has less impact on life and work. 4. There is no need for extracorporeal blood circulation, no needles, little pain, easy to operate, and can be operated at home. 5. Generally does not need anticoagulant, reducing gastrointestinal bleeding and cerebral hemorrhage complications. 6. It can better protect the residual kidney function. Patients are advised to wash their hands carefully before doing peritoneal dialysis, clean the tabletop carefully, check the shape of peritoneal dialysis fluid carefully, and do not touch the sterile part of the peritoneal dialysis line with other dirty objects during the operation. It is recommended that patients go to regular hospitals and standardize the diagnosis and treatment under the guidance of physicians, so as not to make mistakes.