There is no fixed standard for how much creatinine should be reduced after peritoneal dialysis, and it is analyzed below. Peritoneal dialysis is suitable for patients with uremia, which is the end stage of chronic renal failure, and is generally treated with peritoneal dialysis for creatinine >707Umol/L or more. The benefits of peritoneal dialysis for uremic patients are to protect residual renal function, reduce creatinine and other small molecules of toxins, reduce medium and large molecules of toxins, and shed excess water to prevent water and sodium retention. Peritoneal dialysis can reduce creatinine, but there is no fixed standard for peritoneal dialysis patients as to how much creatinine can be reduced to normal, which is related to the function of the peritoneum and so on. Moreover, peritoneal dialysis mainly removes large molecule toxins from the body of uremic patients, while creatinine is a representative of small molecule toxins in the body. So the function of removing toxins by peritoneal dialysis is sometimes not fully expressed by the creatinine.