I. What is renal failure? Chronic renal failure (uremic phase) is a clinical syndrome that occurs in the late stage of various chronic kidney diseases. It is a progressive kidney damage and gradual deterioration of kidney function caused by primary kidney disease or secondary to other kidney diseases. When the kidney damage develops to the extent that it cannot maintain the stability of the body’s internal environment, it will lead to the accumulation of toxic metabolites in the body, disorders of water, electrolytes, acid-base balance and abnormalities of some endocrine functions. II. What is peritoneal dialysis? A special liquid called “peritoneal dialysis fluid” is instilled into the peritoneal cavity through a “peritoneal dialysis tube”, and at this time, one side of the peritoneum is blood containing metabolic waste and excess water, and the other side is a dry and still peritoneal dialysis fluid. The metabolic waste and excess water from the blood will run through the peritoneum into the peritoneal fluid. After 3-4 hours of retention (8-10 hours at night), this peritoneal dialysis fluid containing waste water is released from the peritoneal cavity and new peritoneal dialysis fluid is filled in. In this way, it is replaced 4-5 times a day, so that the toxins and excess water can be continuously discharged from the body. III. What are the advantages of peritoneal dialysis? Peritoneal dialysis has been used for more than 30 years to maintain the life of patients with uremia. Currently in Hong Kong and some European countries, 80% of uremic patients are living, working and studying under peritoneal dialysis treatment. So what are the advantages of peritoneal dialysis? 1.Protection of residual kidney function is better than hemodialysis: peritoneal dialysis does not have recurrent hypotension, which often occurs in hemodialysis and causes kidney ischemia; it helps to maintain hematocrit and blood pressure, thus reducing the use of erythropoietin and antihypertensive drugs. 2, wide range of use: peritoneal dialysis cardiovascular stability is good, is accompanied by serious cardiovascular disease, cerebrovascular disease, diabetes and elderly patients preferred dialysis mode; peritoneal dialysis less dietary restrictions, the patient’s nutritional status is better, less impact on the growth and development of children, and eliminate the pain of hemodialysis puncture; peritoneal dialysis does not require arteriovenous fistula, avoiding diabetic patients due to peripheral vascular disease caused by arteriovenous fistula The use of insulin in the abdominal cavity is closer to physiological, and blood sugar control is ideal. 3, high dialysis efficiency: better clearance of medium-molecular toxin substances, β2 microglobulin and phosphorus. Therefore, abdominal dialysis can improve the symptoms of uremia, and the improvement of anemia and neuropathy is better than hemodialysis. 4, abdominal dialysis is the treatment option closest to the physiological state: there are no sudden changes in hemodynamics, fluid volume and biochemistry during abdominal dialysis, thus reducing dialysis complications arising from the instability of the internal environment, such as cardiovascular lesions, hypertension, hypotension, arrhythmia, etc. 5.The amount of cytokinin required to correct the same degree of anemia is less than that of hemodialysis patients. 6.The chance of occurrence of viral hepatitis B and C is less. 7.The degree of dialysis bone disease occurring in long-term dialysis is also better than hemodialysis. 8.Dialysis can be performed at home without going to hospital, which does not affect work, study and travel, and the treatment cost is lower. 9.High quality of life.